{"title":"6.6L Duramax LLY(2004-2005)","description":"\u003cp data-path-to-node=\"6\"\u003eUnlock the true potential of your heavy-duty truck with our premium performance upgrades for the \u003cstrong data-path-to-node=\"6\" data-index-in-node=\"97\"\u003e6.6L Duramax LLY(2004-2005)\u003c\/strong\u003e. As the second generation of the Duramax family, the \u003cstrong data-path-to-node=\"6\" data-index-in-node=\"178\"\u003e6.6L Duramax LLY(2004-2005)\u003c\/strong\u003e engine introduced a variable geometry turbocharger (VGT) and enhanced emissions controls that often lead to higher operating temperatures. Whether you are daily driving or hauling heavy loads, maintaining your \u003cstrong data-path-to-node=\"6\" data-index-in-node=\"416\"\u003e6.6L Duramax LLY(2004-2005)\u003c\/strong\u003e requires specialized components that address the factory airflow restrictions. Our catalog for the \u003cstrong data-path-to-node=\"6\" data-index-in-node=\"543\"\u003e6.6L Duramax LLY(2004-2005)\u003c\/strong\u003e is specifically curated to help owners eliminate common overheating issues and improve the overall efficiency of their 2004–2005 Chevy Silverado or GMC Sierra 2500HD\/3500.\u003c\/p\u003e\n\u003ch2 data-path-to-node=\"7\"\u003e\u003cstrong data-path-to-node=\"7\" data-index-in-node=\"0\"\u003eMaximize Reliability for Your 6.6L Duramax LLY(2004-2005) Diesel\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-path-to-node=\"8\"\u003eThe \u003cstrong data-path-to-node=\"8\" data-index-in-node=\"4\"\u003e6.6L Duramax LLY(2004-2005)\u003c\/strong\u003e platform is a legendary workhorse, but it is well-known for restrictive turbo mouthpieces that stifle air intake. To maximize the longevity of your \u003cstrong data-path-to-node=\"8\" data-index-in-node=\"180\"\u003e6.6L Duramax LLY(2004-2005)\u003c\/strong\u003e, it is essential to invest in high-flow induction systems and cooling upgrades that protect the engine during intense towing cycles. By installing a performance exhaust system on your \u003cstrong data-path-to-node=\"8\" data-index-in-node=\"392\"\u003e6.6L Duramax LLY(2004-2005)\u003c\/strong\u003e, you can significantly lower Exhaust Gas Temperatures (EGTs) and improve throttle response. Every part designed for the \u003cstrong data-path-to-node=\"8\" data-index-in-node=\"540\"\u003e6.6L Duramax LLY(2004-2005)\u003c\/strong\u003e in our collection is built to meet or exceed factory specifications for long-term reliability. Investing in high-quality \u003cstrong data-path-to-node=\"8\" data-index-in-node=\"689\"\u003e6.6L Duramax LLY(2004-2005)\u003c\/strong\u003e parts is the best way to ensure your classic diesel remains a powerhouse on the road.\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"9\"\u003e\u003cstrong data-path-to-node=\"9\" data-index-in-node=\"0\"\u003eKey Performance Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"10\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,0,0\"\u003e\u003cstrong data-path-to-node=\"10,0,0\" data-index-in-node=\"0\"\u003eFixed Airflow Restrictions:\u003c\/strong\u003e Upgraded mouthpieces for the \u003cstrong data-path-to-node=\"10,0,0\" data-index-in-node=\"57\"\u003e6.6L Duramax LLY(2004-2005)\u003c\/strong\u003e allow the turbo to breathe better and run cooler.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,1,0\"\u003e\u003cstrong data-path-to-node=\"10,1,0\" data-index-in-node=\"0\"\u003eReduced Engine Heat:\u003c\/strong\u003e Performance cooling solutions for the \u003cstrong data-path-to-node=\"10,1,0\" data-index-in-node=\"59\"\u003e6.6L Duramax LLY(2004-2005)\u003c\/strong\u003e address the common heat soak issues found in 2004–2005 models.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,2,0\"\u003e\u003cstrong data-path-to-node=\"10,2,0\" data-index-in-node=\"0\"\u003eIncreased Horsepower:\u003c\/strong\u003e Advanced tuning and fuel system mods allow your \u003cstrong data-path-to-node=\"10,2,0\" data-index-in-node=\"70\"\u003e6.6L Duramax LLY(2004-2005)\u003c\/strong\u003e to reach its full torque potential.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,3,0\"\u003e\u003cstrong data-path-to-node=\"10,3,0\" data-index-in-node=\"0\"\u003eImproved Fuel Economy:\u003c\/strong\u003e Optimizing the combustion cycle in the \u003cstrong data-path-to-node=\"10,3,0\" data-index-in-node=\"62\"\u003e6.6L Duramax LLY(2004-2005)\u003c\/strong\u003e often results in immediate MPG gains.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"11\"\u003e\u003cstrong data-path-to-node=\"11\" data-index-in-node=\"0\"\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"12\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,0,0\"\u003e\u003cstrong data-path-to-node=\"12,0,0\" data-index-in-node=\"0\"\u003eEngine Type:\u003c\/strong\u003e 6.6L 32-Valve V8 Turbo Diesel (LLY Code)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,1,0\"\u003e\u003cstrong data-path-to-node=\"12,1,0\" data-index-in-node=\"0\"\u003eCompatibility:\u003c\/strong\u003e 2004, 2005 Chevrolet Silverado \/ GMC Sierra 2500HD \u0026amp; 3500\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,2,0\"\u003e\u003cstrong data-path-to-node=\"12,2,0\" data-index-in-node=\"0\"\u003eInjection System:\u003c\/strong\u003e Bosch Common Rail with CP3 Pump\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,3,0\"\u003e\u003cstrong data-path-to-node=\"12,3,0\" data-index-in-node=\"0\"\u003eRecommended Mods:\u003c\/strong\u003e Turbo Inlet Pipes, EGR Deletes, and 4\" Exhaust Systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"lly-egr-delete-kit-high-flow-intake-2004-5-2005","title":"2004.5-2005 6.6L GM Duramax LLY EGR Delete Kit with Intake Elbow","description":"\u003ch2 data-path-to-node=\"3\"\u003e2004.5-2005 6.6L GM Duramax LLY EGR Delete Kit with Intake Elbow\u003c\/h2\u003e\n\u003cp data-path-to-node=\"4\"\u003eUnlock the full performance potential of your \u003cstrong data-path-to-node=\"4\" data-index-in-node=\"46\"\u003e6.6L Duramax LLY\u003c\/strong\u003e with our premium \u003cstrong data-path-to-node=\"4\" data-index-in-node=\"80\"\u003eEGR Delete Kit\u003c\/strong\u003e. Specifically engineered for 2004.5–2005 Silverado and Sierra 2500HD\/3500HD trucks, this kit is the ultimate solution for permanently removing the restrictive factory EGR valve and cooler.\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003eBy replacing the factory bottleneck with our \u003cstrong data-path-to-node=\"5\" data-index-in-node=\"45\"\u003eHigh-Flow Intake upgrade\u003c\/strong\u003e, you ensure your engine receives a constant supply of clean, oxygen-rich air. This results in faster turbo spooling, sharper throttle response, and a significant reduction in soot-related engine wear.\u003c\/p\u003e\n\u003chr data-path-to-node=\"6\"\u003e\n\u003ch3 data-path-to-node=\"7\"\u003eKey Features \u0026amp; Performance Benefits\u003c\/h3\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\"\u003e\u003cstrong data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003eHigh-Flow Intake Design:\u003c\/strong\u003e Replaces the restrictive factory intake bridge, maximizing airflow efficiency and improving mid-range torque.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cstrong data-path-to-node=\"8,1,0\" data-index-in-node=\"0\"\u003eStop Carbon Buildup:\u003c\/strong\u003e Prevents abrasive exhaust soot from recirculating into your intake manifold, keeping your engine oil cleaner and protecting vital internal components.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,2,0\"\u003e\u003cstrong data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003eOptimized Cooling Performance:\u003c\/strong\u003e Eliminates the EGR cooler to prevent hot exhaust gases from heating your engine coolant, leading to lower overall operating temperatures.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,3,0\"\u003e\u003cstrong data-path-to-node=\"8,3,0\" data-index-in-node=\"0\"\u003eIncreased Fuel Efficiency:\u003c\/strong\u003e By allowing the engine to run cleaner and more efficiently, many LLY owners experience up to \u003cstrong data-path-to-node=\"8,3,0\" data-index-in-node=\"120\"\u003e20% better fuel economy\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,4,0\"\u003e\u003cstrong data-path-to-node=\"8,4,0\" data-index-in-node=\"0\"\u003eHeavy-Duty Construction:\u003c\/strong\u003e Formulated for high-temperature applications and extreme towing, with components designed to withstand thermal cycling without cracking or leaking.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"9\"\u003e\n\u003ch3 data-path-to-node=\"10\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable data-path-to-node=\"11\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAttribute\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetail\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,1,0,0\"\u003e\u003cstrong data-path-to-node=\"11,1,0,0\" data-index-in-node=\"0\"\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,1,1,0\"\u003e6.6L V8 Duramax (LLY Code)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,2,0,0\"\u003e\u003cstrong data-path-to-node=\"11,2,0,0\" data-index-in-node=\"0\"\u003eModel Years\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,2,1,0\"\u003e2004.5, 2005\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,3,0,0\"\u003e\u003cstrong data-path-to-node=\"11,3,0,0\" data-index-in-node=\"0\"\u003eComponents\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,3,1,0\"\u003eEGR Valve\/Cooler Delete + High-Flow Intake Bridge\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,4,0,0\"\u003e\u003cstrong data-path-to-node=\"11,4,0,0\" data-index-in-node=\"0\"\u003eMaterial\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,4,1,0\"\u003eHigh-Grade Billet Aluminum \u0026amp; Stainless Steel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,5,0,0\"\u003e\u003cstrong data-path-to-node=\"11,5,0,0\" data-index-in-node=\"0\"\u003eHardware\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,5,1,0\"\u003eHigh-Temp Seals and Precision Block-Off Plates Included\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,6,0,0\"\u003e\u003cstrong data-path-to-node=\"11,6,0,0\" data-index-in-node=\"0\"\u003eUsage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,6,1,0\"\u003eOff-Road \u0026amp; Competition Use Only\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr data-path-to-node=\"12\"\u003e\n\u003ch3 data-path-to-node=\"13\"\u003eDetailed Vehicle Fitment Guide\u003c\/h3\u003e\n\u003cp data-path-to-node=\"14\"\u003eThis kit is a precision-fit replacement for the following \u003cstrong data-path-to-node=\"14\" data-index-in-node=\"58\"\u003e6.6L LLY Duramax\u003c\/strong\u003e pickup trucks:\u003c\/p\u003e\n\u003cul data-path-to-node=\"15\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"15,0,0\"\u003e\u003cstrong data-path-to-node=\"15,0,0\" data-index-in-node=\"0\"\u003e2004.5-2005 Chevrolet Silverado 2500HD \/ 3500HD\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"15,1,0\"\u003e\u003cstrong data-path-to-node=\"15,1,0\" data-index-in-node=\"0\"\u003e2004.5-2005 GMC Sierra 2500HD \/ 3500HD\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"15,2,0\"\u003e\u003cem data-path-to-node=\"15,2,0\" data-index-in-node=\"0\"\u003eNote: Specifically for the LLY engine code (8th digit of VIN is \"2\"). Please ensure your vehicle matches this engine configuration before purchase.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"16\"\u003e\n\u003ch3 data-path-to-node=\"17\"\u003eWhy Upgrade Your LLY Duramax?\u003c\/h3\u003e\n\u003cp data-path-to-node=\"18\"\u003eThe \u003cstrong data-path-to-node=\"18\" data-index-in-node=\"4\"\u003eLLY Duramax\u003c\/strong\u003e is famous for its power but is notorious for overheating issues related to the factory EGR system and restrictive air intake. Installing this \u003cstrong data-path-to-node=\"18\" data-index-in-node=\"158\"\u003eLLY EGR Delete\u003c\/strong\u003e is a proactive step toward extreme reliability. By eliminating the source of hot exhaust recirculation and soot clogs, you reduce the risk of head gasket failure and avoid the high costs of repairing aging factory components.\u003c\/p\u003e\n\u003chr data-path-to-node=\"19\"\u003e\n\u003ch3 data-path-to-node=\"20\"\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp data-path-to-node=\"21\"\u003e\u003cstrong data-path-to-node=\"21\" data-index-in-node=\"0\"\u003eQ: Will this kit require a tuner?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"21\"\u003e\u003cstrong data-path-to-node=\"21\" data-index-in-node=\"34\"\u003eA:\u003c\/strong\u003e Yes. Removing the EGR system on an LLY engine will typically trigger a Check Engine Light (CEL). A performance tuner is required to disable the EGR codes and optimize engine calibration.\u003c\/p\u003e\n\u003cp data-path-to-node=\"22\"\u003e\u003cstrong data-path-to-node=\"22\" data-index-in-node=\"0\"\u003eQ: Is the high-flow intake bridge included?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"22\"\u003e\u003cstrong data-path-to-node=\"22\" data-index-in-node=\"44\"\u003eA:\u003c\/strong\u003e Yes. This kit is the \"High Flow\" version which includes the intake bridge to provide a smoother air path compared to basic block-off plates.\u003c\/p\u003e\n\u003cp data-path-to-node=\"23\"\u003e\u003cstrong data-path-to-node=\"23\" data-index-in-node=\"0\"\u003eQ: Is this kit suitable for heavy towing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"23\"\u003e\u003cstrong data-path-to-node=\"23\" data-index-in-node=\"42\"\u003eA:\u003c\/strong\u003e Absolutely. It is specifically designed for heavy-duty use. By lowering EGTs (Exhaust Gas Temperatures), your truck will remain more stable and reliable under heavy loads.\u003c\/p\u003e","brand":"DieselPerf","offers":[{"title":"Default Title","offer_id":47257289687293,"sku":"DIPEGR-1037","price":83.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/6526\/2077\/files\/ChatGPT_Image_May_13_2026_09_56_26_PM_4.png?v=1785762653"},{"product_id":"lly-egr-delete-kit-6-6-duramax-gmc-2004-2005","title":"2004.5-2005 6.6L GM Duramax LLY EGR Delete Kit","description":"\u003ch2\u003e2004.5-2005 6.6L GM Duramax LLY EGR Delete Kit\u003c\/h2\u003e\n\u003cp\u003eProtect your engine and reclaim lost performance with our professional-grade \u003cstrong\u003eEGR Delete Kit for the 2004.5–2005 6.6L Duramax LLY\u003c\/strong\u003e. This complete block-off system is engineered to permanently eliminate the restrictive factory EGR valve and cooler, preventing abrasive soot from recirculating through your intake manifold and internal engine components.\u003c\/p\u003e\n\u003cp\u003eBy bypassing the Exhaust Gas Recirculation system, you ensure your \u003cstrong\u003eLLY Duramax\u003c\/strong\u003e breathes only clean, fresh air, leading to a more efficient combustion cycle, lower operating temperatures, and long-term mechanical reliability.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features \u0026amp; Performance Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOptimized Fuel Economy:\u003c\/strong\u003e Restores engine efficiency and reduces exhaust backpressure, helping owners see fuel economy gains of up to \u003cstrong\u003e20%\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThermal Management:\u003c\/strong\u003e Eliminates the EGR cooler to prevent hot exhaust gases from heating your engine coolant. This results in significantly lower coolant and oil temperatures, especially during heavy-duty towing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIntake Protection:\u003c\/strong\u003e Stops the \"soot-clogging\" effect in the intake valves and manifold, ensuring your engine stays clean internally and maintains peak throttle response.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCost-Effective Reliability:\u003c\/strong\u003e Avoid the high costs of replacing or cleaning aging factory EGR components by switching to a permanent, maintenance-free solution.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAttribute\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetail\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e6.6L V8 Duramax (LLY Code)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModel Years\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2004.5 - 2005 (2004.5)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBillet Aluminum \u0026amp; High-Grade Stainless Steel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eKit Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eComplete Valve \u0026amp; Cooler Block Off System\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eUsage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOff-Road \u0026amp; Competition Use Only\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eDetailed Vehicle Fitment Guide\u003c\/h3\u003e\n\u003cp\u003eThis kit is a precision-fit replacement for the following \u003cstrong\u003e6.6L LLY Duramax\u003c\/strong\u003e pickup trucks:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2004.5-2005 Chevrolet Silverado 2500HD \/ 3500HD\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2004.5-2005 GMC Sierra 2500HD \/ 3500HD\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cem\u003eNote: Specifically for the LLY engine code (8th digit of VIN is \"2\"). Please ensure your vehicle matches this engine configuration before purchase.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eWhy Upgrade Your LLY Duramax?\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eLLY Duramax\u003c\/strong\u003e is a legendary power plant but is notorious for heat-related issues. The factory EGR system contributes to excessive engine bay heat and head gasket stress. Installing an \u003cstrong\u003eLLY EGR Delete\u003c\/strong\u003e is a proactive upgrade for any owner looking to improve the longevity of their truck. By removing the source of hot exhaust recirculation, you reduce the thermal load on the cooling system and prevent power-robbing carbon deposits.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this kit cause a Check Engine Light (CEL)?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. To prevent diagnostic trouble codes (DTCs) and ensure the engine operates correctly without the EGR system, an EGR-delete capable tuner is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this kit suitable for heavy towing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Absolutely. It is specifically designed for heavy-duty use. By lowering EGTs (Exhaust Gas Temperatures), your truck will remain more stable and reliable under heavy loads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the installation a direct replacement?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the plates and gaskets are designed to match factory mounting points. However, professional installation is recommended as the process involves deep engine bay access.\u003c\/p\u003e","brand":"DieselPerf","offers":[{"title":"Default Title","offer_id":47257294471421,"sku":"DIPEGR-1002","price":59.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/6526\/2077\/files\/ChatGPT_Image_May_13_2026_09_59_10_PM_1.png?v=1785762711"},{"product_id":"stainless-steel-diesel-muffler-4-5-inch-cummins-duramax-powerstroke","title":"4\" \u0026 5\" Stainless Steel Diesel Muffler for Ram Cummins, Duramax \u0026 Powerstroke","description":"\u003cp\u003eUpgrade your diesel truck’s exhaust system with a high-performance T409 stainless steel diesel muffler designed for strong airflow, durable performance, and a deep, refined exhaust tone. Available in both 4-inch and 5-inch inlet\/outlet sizes, this muffler is a practical choice for many Ram Cummins, Ford Powerstroke, and Chevy\/GMC Duramax diesel exhaust systems.\u003c\/p\u003e\n\u003cp\u003eBuilt with a straight-through performance core, this muffler helps reduce exhaust restriction and supports smoother exhaust flow compared with many factory-style baffled mufflers. Whether your truck is used for towing, hauling, daily driving, or performance upgrades, it delivers a strong diesel sound without the harsh rasp often associated with muffler-delete setups.\u003c\/p\u003e\n\u003cp\u003eThe heavy-duty T409 stainless steel body is made to handle high exhaust temperatures, road conditions, and long-term use. Inside, stainless steel mesh and heat-resistant fiberglass packing help absorb unwanted resonance while maintaining a deep, aggressive tone outside the vehicle.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable in 4\" and 5\" Sizes\u003c\/strong\u003e\u003cbr\u003eChoose the correct inlet and outlet diameter for your diesel exhaust setup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eT409 Stainless Steel Construction\u003c\/strong\u003e\u003cbr\u003eDurable stainless steel material helps resist corrosion and withstand demanding diesel truck conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStraight-Through Performance Core\u003c\/strong\u003e\u003cbr\u003eDesigned to improve exhaust flow and reduce unnecessary backpressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDeep Diesel Exhaust Tone\u003c\/strong\u003e\u003cbr\u003eInternal stainless steel mesh and fiberglass packing help control rasp and cabin drone while keeping a rich, powerful sound.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUniversal Non-Directional Design\u003c\/strong\u003e\u003cbr\u003eCan be installed in either direction, making it suitable for many custom or replacement exhaust systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Diesel Applications\u003c\/strong\u003e\u003cbr\u003eCompatible with many 4-inch and 5-inch diesel exhaust systems used on Cummins, Duramax, and Powerstroke trucks.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"border-collapse: collapse;\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eT409 Heavy-Duty Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize Options\u003c\/td\u003e\n\u003ctd\u003e4.0-Inch or 5.0-Inch Inlet\/Outlet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Design\u003c\/td\u003e\n\u003ctd\u003eStraight-Through Performance Core\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePacking Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel Mesh and Heat-Resistant Fiberglass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow Direction\u003c\/td\u003e\n\u003ctd\u003eNon-Directional \/ Bi-Directional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment Type\u003c\/td\u003e\n\u003ctd\u003eUniversal Fit for Matching Exhaust Pipe Diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\n\u003cp\u003eThis diesel muffler is designed for trucks equipped with matching 4-inch or 5-inch exhaust piping, including many:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRam Cummins 2500\/3500 models\u003c\/li\u003e\n\u003cli\u003eFord Powerstroke F-250\/F-350 models\u003c\/li\u003e\n\u003cli\u003eChevy\/GMC Duramax 2500\/3500 models\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease measure your existing exhaust pipe diameter before ordering to confirm whether you need the 4-inch or 5-inch version.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose This Diesel Muffler?\u003c\/h2\u003e\n\u003cp\u003eFactory-style mufflers can restrict airflow and soften the diesel sound many truck owners want. This stainless steel diesel muffler combines a high-flow straight-through design with internal sound-control materials, giving you the performance feel of a freer-flowing exhaust system with a cleaner, more controlled tone.\u003c\/p\u003e\n\u003cp\u003eIt is a strong upgrade for drivers who want better exhaust flow, durable stainless steel construction, and a deep diesel sound without excessive interior noise.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it matter which end is the inlet?\u003c\/strong\u003e\u003cbr\u003eNo. This muffler uses a non-directional design, so it can be installed in either direction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit my truck?\u003c\/strong\u003e\u003cbr\u003eThis is a universal muffler designed for 4-inch or 5-inch diesel exhaust systems. Please check your current pipe diameter before purchase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it make my truck louder?\u003c\/strong\u003e\u003cbr\u003eIt is designed to provide a deeper and more aggressive diesel tone while helping reduce harsh rasp and unwanted resonance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this muffler suitable for towing and heavy-duty use?\u003c\/strong\u003e\u003cbr\u003eYes. The T409 stainless steel body and heat-resistant internal materials are designed for demanding diesel truck applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo diesels need special mufflers?\u003c\/strong\u003e\u003cbr\u003eDiesel trucks benefit from mufflers designed for high exhaust flow and heat resistance, like this straight-through stainless steel diesel muffler.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan you put a muffler on a diesel?\u003c\/strong\u003e\u003cbr\u003eYes. A diesel muffler can be added to help control sound while maintaining strong exhaust flow and performance.\u003c\/p\u003e","brand":"DieselPerf","offers":[{"title":"4''","offer_id":47261363503357,"sku":"DIPSJ-409MUF-4+DIPSJ-KG-4*2","price":124.0,"currency_code":"USD","in_stock":true},{"title":"5''","offer_id":47261363536125,"sku":"DIPSJ-409MUF-5+DIPSJ-KG-5*2","price":144.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/6526\/2077\/files\/4_5StainlessSteelDieselMufflerforRamCummins-4.jpg?v=1773072375"},{"product_id":"chrome-turn-down-diesel-exhaust-tip-5in-8out","title":"Chrome Turn Down Exhaust Tip: 5'' In 8'' Out","description":"\u003ch2\u003eChrome Turn Down Exhaust Tip | 58-Degree Diesel Dump Tip\u003c\/h2\u003e\n\u003cp\u003eGive your diesel truck an aggressive, custom look while helping direct exhaust heat and soot away from your trailer with our premium \u003cstrong\u003eChrome Turn Down Exhaust Tip\u003c\/strong\u003e. Available in two high-demand transition sizes—\u003cstrong\u003e5'' in 8'' Out\u003c\/strong\u003e—these chrome diesel exhaust tips are engineered to deliver a bold exit for your exhaust gases.\u003c\/p\u003e\n\u003cp\u003eFeaturing a precision \u003cstrong\u003e58-degree bend\u003c\/strong\u003e, these \"Dump Tips\" direct exhaust flow downward and away from the vehicle body. The brilliant chrome finish provides a mirror-like shine that resists the elements, making it a perfect upgrade for show trucks and daily drivers alike.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAggressive Turn-Down Style:\u003c\/strong\u003e The 45-degree elbow design directs exhaust soot toward the ground, helping prevent carbon buildup on your rear bumper or trailer.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance Flared Design:\u003c\/strong\u003e Available in flared configurations (5'' in 8'' Out) to create a deeper, more resonant exhaust note and a powerful rear-end appearance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePremium Chrome Mirror Finish:\u003c\/strong\u003e High-luster chrome plating provides a long-lasting shine that stands out on the road while helping resist rust and corrosion.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHeavy-Duty Construction:\u003c\/strong\u003e Built with \u003cstrong\u003e2mm thick Iron walls\u003c\/strong\u003e, ensuring maximum durability against high exhaust temperatures and road debris.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePrecision ID Fitment:\u003c\/strong\u003e Designed with an \u003cstrong\u003eInside Diameter (ID) inlet\u003c\/strong\u003e, allowing the tip to slide directly over your 5\" exhaust pipe for a professional, seamless fit.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eVersatile Installation:\u003c\/strong\u003e Includes a heavy-duty clamp for a secure \"no-weld\" DIY upgrade, and it can also be welded for a permanent, competition-style bond.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 99.9589%; height: 156.666px; border-collapse: collapse;\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 39.2679%; height: 19.5833px;\"\u003e\u003cstrong\u003eAttribute\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.2717%; height: 19.5833px;\"\u003e\u003cstrong\u003eDetail\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 39.2679%; height: 19.5833px;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.2717%; height: 19.5833px;\"\u003eIron chromium plating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 39.2679%; height: 19.5833px;\"\u003e\u003cstrong\u003eInlet Sizes (ID)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.2717%; height: 19.5833px;\"\u003e5'' in 8'' Out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 39.2679%; height: 19.5833px;\"\u003e\u003cstrong\u003eOutlet Sizes (OD)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.2717%; height: 19.5833px;\"\u003e5'' in 8'' Out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 39.2679%; height: 19.5833px;\"\u003e\u003cstrong\u003eBend Angle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.2717%; height: 19.5833px;\"\u003e45-Degree Turn Down \/ Elbow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 39.2679%; height: 19.5833px;\"\u003e\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.2717%; height: 19.5833px;\"\u003e23 Inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 39.2679%; height: 19.5833px;\"\u003e\u003cstrong\u003eWall Thickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.2717%; height: 19.5833px;\"\u003e2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5833px;\"\u003e\n\u003ctd style=\"width: 39.2679%; height: 19.5833px;\"\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.2717%; height: 19.5833px;\"\u003eClamp-On (Included) or Weld-On\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eUniversal Vehicle Fitment Guide\u003c\/h3\u003e\n\u003cp\u003eThese universal tips are designed to fit any diesel vehicle equipped with a 5-inch tailpipe, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRAM Cummins (2500\/3500)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFord Powerstroke (F-250\/F-350)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGMC\/Chevy Duramax (2500\/3500)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eWhy Upgrade to a Turn-Down Tip?\u003c\/h3\u003e\n\u003cp\u003eUnlike standard straight tips, a \u003cstrong\u003eTurn Down Tip\u003c\/strong\u003e directs heat and soot toward the pavement. This is a critical advantage for trucks that tow frequently, as it helps protect trailer paint, tires, and plastic components from high-temperature exhaust exposure. With a massive \u003cstrong\u003e23-inch overall length\u003c\/strong\u003e, this tip makes a significant visual statement while enhancing the sound and styling of your diesel truck.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What does \"Inlet ID\" mean?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e \"Inlet ID\" (Inside Diameter) means the opening is measured from the inside. A 5\" ID tip is designed to slide \u003cstrong\u003eover\u003c\/strong\u003e a 5\" Outside Diameter (OD) exhaust pipe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the installation permanent?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The included clamp provides a very secure fit for daily driving. However, if you do extreme off-roading or want a \"seamless\" look, the tip can be welded directly to the pipe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I maintain the chrome shine?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e We recommend regular cleaning with a standard chrome polish to remove road salt and soot, helping the mirror finish last for years.\u003c\/p\u003e","brand":"DieselPerf","offers":[{"title":"5'' in 8'' Out","offer_id":47829986967805,"sku":"DIPSJ-WH58","price":239.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/6526\/2077\/files\/4_Inlet_5_Outlet-01-4_Inlet_5_Outlet-01_6e2c3afc-44d9-414e-8639-f45c212c8ad9.jpg?v=1788425388"},{"product_id":"4-5-inch-cat-muffler-delete-race-pipe-2001-2007-duramax-lb7-lbz","title":"2001-2007 6.6L GM Duramax LB7 LLY LBZ 4\" \u0026 5\" Downpipe-Back Exhaust","description":"\u003cp\u003eUpgrade the exhaust system on your \u003cstrong\u003e2001–2007 Chevrolet Silverado or GMC Sierra 2500HD\/3500 equipped with a 6.6L Duramax LB7, LLY, or LBZ\u003c\/strong\u003e engine. This T409 stainless steel \u003cstrong\u003edownpipe-back exhaust\u003c\/strong\u003e system replaces the exhaust section downstream of the factory downpipe and is available in 4-inch or 5-inch configurations, with or without a muffler. It is designed for pickup models only and does not fit Cab \u0026amp; Chassis trucks. Some shorter wheelbase configurations may require pipe trimming during installation.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0783\/6526\/2077\/files\/ChatGPT_Image_2026_8_11_14_02_57.png?v=1786428194\" alt=\"2001-2007 Duramax downpipe-back exhaust for Chevy and GMC Silverado Sierra pickups\"\u003e\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDownpipe-Back Exhaust Configuration:\u003c\/strong\u003e\u003cbr\u003eReplaces the exhaust system downstream of the factory downpipe while retaining the original turbo downpipe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4-Inch and 5-Inch Pipe Options:\u003c\/strong\u003e\u003cbr\u003eChoose a 4-inch system for a balanced exhaust upgrade or a 5-inch system for a larger exhaust path and deeper diesel tone.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMuffler and Non-Muffler Versions:\u003c\/strong\u003e\u003cbr\u003eMuffler-equipped options provide a more controlled exhaust note, while non-muffler configurations deliver a louder and more aggressive sound.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eT409 Stainless Steel Construction:\u003c\/strong\u003e\u003cbr\u003eBuilt from durable T409 stainless steel for resistance to heat, corrosion, and demanding road conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMandrel-Bent Tubing:\u003c\/strong\u003e\u003cbr\u003eSmooth mandrel bends help maintain a consistent pipe diameter and support unrestricted exhaust flow.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHeavy-Duty Construction:\u003c\/strong\u003e\u003cbr\u003eThe approximately 2 mm pipe wall is designed to provide strength and durability for diesel truck applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDeeper Duramax Exhaust Tone:\u003c\/strong\u003e\u003cbr\u003eEnhances the natural sound and more aggressive exhaust note of the 6.6L Duramax engine, with the final volume depending on pipe size and muffler selection.\u003c\/p\u003e\n\u003ch2\u003eAvailable Options\u003c\/h2\u003e\n\u003ctable style=\"border-collapse: collapse;\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eOption\u003c\/th\u003e\n\u003cth\u003ePipe Size\u003c\/th\u003e\n\u003cth\u003eMuffler\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\" Downpipe-Back\u003c\/td\u003e\n\u003ctd\u003e4 inch\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4\" Downpipe-Back w\/Muffler\u003c\/td\u003e\n\u003ctd\u003e4 inch\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\" Downpipe-Back\u003c\/td\u003e\n\u003ctd\u003e5 inch\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\" Downpipe-Back w\/Muffler\u003c\/td\u003e\n\u003ctd\u003e5 inch\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhich Option Should You Choose?\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e4-inch non-muffler system\u003c\/strong\u003e provides a more aggressive exhaust note without moving to the largest pipe diameter.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e4-inch muffler system\u003c\/strong\u003e is a practical option for daily-driven or towing trucks where a more controlled sound is preferred.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e5-inch non-muffler system\u003c\/strong\u003e offers the deepest and most aggressive exhaust tone of the four configurations.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e5-inch muffler system\u003c\/strong\u003e combines the larger 5-inch appearance and tone with a muffler to help reduce overall exhaust volume.\u003c\/p\u003e\n\u003cp\u003eActual sound will vary based on engine condition, cab and bed configuration, existing modifications, and selected exhaust option.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"border-collapse: collapse;\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecification\u003c\/td\u003e\n\u003ctd\u003eDetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eDownpipe-back exhaust system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine\u003c\/td\u003e\n\u003ctd\u003e6.6L Duramax V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Codes\u003c\/td\u003e\n\u003ctd\u003eLB7, LLY and LBZ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel Years\u003c\/td\u003e\n\u003ctd\u003e2001–2007 LB7\/LLY\/LBZ applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle Models\u003c\/td\u003e\n\u003ctd\u003eChevrolet Silverado and GMC Sierra 2500HD\/3500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePipe Diameter\u003c\/td\u003e\n\u003ctd\u003e4 inch or 5 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eT409 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall Thickness\u003c\/td\u003e\n\u003ctd\u003eApproximately 2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eMandrel-bent tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMuffler\u003c\/td\u003e\n\u003ctd\u003eAvailable with or without muffler\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCab \u0026amp; Chassis Fitment\u003c\/td\u003e\n\u003ctd\u003eNot compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\n\u003ch3\u003eChevrolet Silverado\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e2001–2004 Silverado 2500HD\/3500 with 6.6L Duramax LB7\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2004.5–2005 Silverado 2500HD\/3500 with 6.6L Duramax LLY\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2006–2007 Silverado 2500HD\/3500 with 6.6L Duramax LBZ\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGMC Sierra\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e2001–2004 Sierra 2500HD\/3500 with 6.6L Duramax LB7\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2004.5–2005 Sierra 2500HD\/3500 with 6.6L Duramax LLY\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2006–2007 Sierra 2500HD\/3500 with 6.6L Duramax LBZ\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Fitment Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDoes not fit Cab \u0026amp; Chassis models.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDownpipe-back exhaust pipe sections\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExhaust clamps\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExhaust hangers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMuffler on options specifically labeled “w\/Muffler”\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe number and shape of individual pipe sections may vary by selected diameter and muffler configuration.\u003c\/p\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eThis system is designed to connect downstream of the factory turbo downpipe. Some shorter wheelbase configurations may require cutting or trimming an intermediate pipe section to achieve the correct overall length.\u003c\/p\u003e\n\u003cp\u003eInstallation time varies depending on vehicle condition, corrosion, wheelbase, exhaust configuration, and installer experience. Professional installation is recommended when exhaust alignment or pipe modification is required.\u003c\/p\u003e\n\u003cp\u003eCheck all clamps, connections, hangers, and clearances after installation. Recheck and retighten the exhaust clamps after the first complete heat cycle.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a DPF delete pipe?\u003c\/strong\u003e\u003cbr\u003eNo. The listed LB7, LLY, and LBZ trucks were produced before the 2007.5 LMM DPF-equipped platform. This product is a downpipe-back exhaust system for compatible 2001–2007 Duramax applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does downpipe-back exhaust mean?\u003c\/strong\u003e\u003cbr\u003eA downpipe-back exhaust replaces the exhaust components after the factory turbo downpipe. It does not replace the downpipe itself.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this system replace the factory turbo downpipe?\u003c\/strong\u003e\u003cbr\u003eNo. A downpipe-back system begins downstream of the factory downpipe. It should not be confused with a turbo-back exhaust system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between the 4-inch and 5-inch systems?\u003c\/strong\u003e\u003cbr\u003eThe main difference is pipe diameter. The 5-inch system has a larger exhaust path and generally produces a deeper tone. The 4-inch system offers a more moderate pipe size and exhaust sound.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich options include a muffler?\u003c\/strong\u003e\u003cbr\u003eThe 4\" Downpipe-Back w\/Muffler and 5\" Downpipe-Back w\/Muffler options include a muffler. Options without “w\/Muffler” use a non-muffler configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the non-muffler version be louder?\u003c\/strong\u003e\u003cbr\u003eYes. A non-muffler exhaust configuration generally produces a louder and more aggressive exhaust note than the corresponding muffler-equipped version.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill cutting be required?\u003c\/strong\u003e\u003cbr\u003eSome shorter wheelbase, cab, or bed configurations may require trimming an intermediate pipe. Measure and test-fit all components before cutting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit Cab \u0026amp; Chassis trucks?\u003c\/strong\u003e\u003cbr\u003eNo. This system is not designed for Cab \u0026amp; Chassis applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs a tuner required?\u003c\/strong\u003e\u003cbr\u003eA tuner is not automatically required for a conventional downpipe-back exhaust installation. Requirements may vary depending on the truck’s existing exhaust configuration, calibration, and other modifications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs a downpipe-back exhaust illegal?\u003c\/strong\u003e\u003cbr\u003eLegality depends on local and state emissions and noise laws. Check all applicable regulations before purchase and installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much HP will a downpipe-back exhaust add?\u003c\/strong\u003e\u003cbr\u003ePower gains vary by vehicle condition and setup. This product is primarily designed to improve exhaust flow and sound rather than guarantee a specific horsepower increase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs a downpipe-back exhaust bad for the engine?\u003c\/strong\u003e\u003cbr\u003eWhen properly installed on a compatible truck, it is not inherently bad for the engine. Always confirm fitment and install all components correctly.\u003c\/p\u003e\n\u003ch2\u003eCompliance Notice\u003c\/h2\u003e\n\u003cp\u003eThe purchaser and installer are responsible for confirming that the selected exhaust configuration complies with all applicable federal, state, and local laws. \u003c\/p\u003e","brand":"DieselPerf","offers":[{"title":"4\" Downpipe-Back(2001-2007)","offer_id":47261524427005,"sku":"DIPSJ-013","price":435.0,"currency_code":"USD","in_stock":true},{"title":"4\" Downpipe-Back w\/Muffler(2001-2007)","offer_id":47411641123069,"sku":"DIPSJ-013M","price":535.0,"currency_code":"USD","in_stock":true},{"title":"5\" Downpipe-Back(2001-2007)","offer_id":47261524459773,"sku":"DIPSJ-007","price":569.0,"currency_code":"USD","in_stock":true},{"title":"5\" Downpipe-Back w\/Muffler(2001-2007)","offer_id":47261524492541,"sku":"DIPSJ-007M","price":669.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/6526\/2077\/files\/Gemini_Generated_Image_xggfipxggfipxggf.png?v=1791088144"},{"product_id":"2004-5-2005-duramax-lly-6-6l-all-in-one-delete-kit","title":"2004.5-2005 Duramax LLY 6.6L All-in-One Delete Kit: EGR, CCV \u0026 Tuner","description":"\u003cp data-path-to-node=\"6\"\u003eTake total control of your 2004.5–2005 Chevy Silverado or GMC Sierra 2500\/3500 HD performance with the professional-grade \u003cstrong data-path-to-node=\"6\" data-index-in-node=\"120\"\u003eAll-in-One Delete Kit\u003c\/strong\u003e. While the factory 6.6L Duramax is a legendary workhorse, it is often held back by restrictive emissions components that cause heavy carbon buildup, rising engine temperatures, and reduced fuel efficiency. This comprehensive \u003cstrong data-path-to-node=\"6\" data-index-in-node=\"367\"\u003eAll-in-One Delete Kit\u003c\/strong\u003e is engineered to modernize your rig by providing the specialized hardware and software needed to bypass these factory bottlenecks. By combining a high-flow EGR bypass, an oil-isolating CCV reroute, and a digital performance tuner, the \u003cstrong data-path-to-node=\"6\" data-index-in-node=\"624\"\u003eAll-in-One Delete Kit\u003c\/strong\u003e ensures your engine receives only cool, clean air for maximum combustion efficiency and long-term durability.\u003c\/p\u003e\n\u003ch2 data-path-to-node=\"7\"\u003e\u003cstrong data-path-to-node=\"7\" data-index-in-node=\"0\"\u003eMaximize Your LLY Performance with the All-in-One Delete Kit\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-path-to-node=\"8\"\u003eThis \u003cstrong data-path-to-node=\"8\" data-index-in-node=\"5\"\u003eAll-in-One Delete Kit\u003c\/strong\u003e is the definitive \"bulletproofing\" solution for owners looking to eliminate EGR soot clogging and oily intake sludge permanently. By stopping the recirculation of hot exhaust gases, the \u003cstrong data-path-to-node=\"8\" data-index-in-node=\"213\"\u003eAll-in-One Delete Kit\u003c\/strong\u003e prevents \"gunk\" from forming on your intake valves, which significantly extends the life of your 6.6L engine. Most truck owners who install the \u003cstrong data-path-to-node=\"8\" data-index-in-node=\"379\"\u003eAll-in-One Delete Kit\u003c\/strong\u003e report a noticeable improvement in miles per gallon and a drastic reduction in Exhaust Gas Temperatures (EGTs), which is essential for heavy towing. This \u003cstrong data-path-to-node=\"8\" data-index-in-node=\"555\"\u003eAll-in-One Delete Kit\u003c\/strong\u003e utilizes CNC-machined billet aluminum and high-grade stainless steel to ensure a leak-proof fit that outperforms the prone-to-fail factory OEM design.\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"9\"\u003e\u003cstrong data-path-to-node=\"9\" data-index-in-node=\"0\"\u003eWhat’s Included in the All-in-One Delete Kit\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-path-to-node=\"10\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,0,0\"\u003e\u003cstrong data-path-to-node=\"10,0,0\" data-index-in-node=\"0\"\u003ePerformance Digital Tuner:\u003c\/strong\u003e Pre-loaded with custom calibrations that optimize the \u003cstrong data-path-to-node=\"10,0,0\" data-index-in-node=\"81\"\u003eAll-in-One Delete Kit\u003c\/strong\u003e by deactivating restrictive sensors and providing selectable power levels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,1,0\"\u003e\u003cstrong data-path-to-node=\"10,1,0\" data-index-in-node=\"0\"\u003eFull EGR Delete Kit:\u003c\/strong\u003e Features precision-machined block-off plates and high-temp gaskets to completely remove the heavy factory cooler and valve.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,2,0\"\u003e\u003cstrong data-path-to-node=\"10,2,0\" data-index-in-node=\"0\"\u003eCCV Reroute Kit:\u003c\/strong\u003e A vital upgrade within the \u003cstrong data-path-to-node=\"10,2,0\" data-index-in-node=\"44\"\u003eAll-in-One Delete Kit\u003c\/strong\u003e that reroutes oily vapors away from the turbocharger to maintain peak cooling performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,3,0\"\u003e\u003cstrong data-path-to-node=\"10,3,0\" data-index-in-node=\"0\"\u003eHigh-Flow Hardware:\u003c\/strong\u003e Every \u003cstrong data-path-to-node=\"10,3,0\" data-index-in-node=\"26\"\u003eAll-in-One Delete Kit\u003c\/strong\u003e includes all necessary bolts, hoses, and clamps for a direct-fit installation on 2004.5–2005 6.6L models.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DieselPerf","offers":[{"title":"EFI LIVE V3 Tuner \/ 4\" Downpipe-Back \/ EGR","offer_id":47277755433213,"sku":"DIPALL-1008-5","price":1556.0,"currency_code":"USD","in_stock":false},{"title":"EFI LIVE V3 Tuner \/ 5\" Downpipe-Back \/ EGR","offer_id":47277772538109,"sku":null,"price":1596.0,"currency_code":"USD","in_stock":true},{"title":"EFI LIVE V3 Tuner \/ 5\" Downpipe-Back w\/Muffler \/ EGR","offer_id":47277772570877,"sku":null,"price":1676.0,"currency_code":"USD","in_stock":true},{"title":"Only EFI LIVE V3 Tuner \/ 4\" Downpipe-Back \/ EGR","offer_id":47277755498749,"sku":"DIPALL-1008-7","price":1487.0,"currency_code":"USD","in_stock":false},{"title":"Only EFI LIVE V3 Tuner \/ 5\" Downpipe-Back \/ EGR","offer_id":47277772603645,"sku":null,"price":1527.0,"currency_code":"USD","in_stock":true},{"title":"Only EFI LIVE V3 Tuner \/ 5\" Downpipe-Back w\/Muffler \/ EGR","offer_id":47277772636413,"sku":null,"price":1607.0,"currency_code":"USD","in_stock":true},{"title":"Only CCV \/ 4\" Downpipe-Back \/ EGR","offer_id":47277771358461,"sku":null,"price":657.0,"currency_code":"USD","in_stock":false},{"title":"Only CCV \/ 5\" Downpipe-Back \/ EGR","offer_id":47277772669181,"sku":null,"price":697.0,"currency_code":"USD","in_stock":true},{"title":"Only CCV \/ 5\" Downpipe-Back w\/Muffler \/ EGR","offer_id":47277772701949,"sku":null,"price":777.0,"currency_code":"USD","in_stock":true},{"title":"Without Tunner and CCV \/ 4\" Downpipe-Back \/ EGR","offer_id":47277771391229,"sku":null,"price":588.0,"currency_code":"USD","in_stock":false},{"title":"Without Tunner and CCV \/ 5\" Downpipe-Back \/ EGR","offer_id":47277772734717,"sku":null,"price":628.0,"currency_code":"USD","in_stock":true},{"title":"Without Tunner and CCV \/ 5\" Downpipe-Back w\/Muffler \/ EGR","offer_id":47277772767485,"sku":null,"price":708.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/6526\/2077\/files\/ALLINONE_6c7d02be-7d69-4102-b6f8-9b0d7b8d985c.png?v=1778254151"},{"product_id":"2001-2007-6-6l-gm-duramax-lb7-lly-lbz-4-downpipe-back-dpf-delete-pipe","title":"2001-2007 6.6L GM Duramax LB7 LLY LBZ 4'' Downpipe-Back DPF Delete Pipe","description":"\u003cp\u003e\u003cspan\u003eUpgrade your \u003cstrong\u003e2001–2007 Chevrolet Silverado or GMC Sierra 2500HD\/3500 equipped with the 6.6L Duramax LB7, LLY, or LBZ\u003c\/strong\u003e engine with this 4-inch downpipe-back exhaust system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eConstructed from T409 stainless steel, the system uses mandrel-bent 4-inch tubing to provide a consistent exhaust path and a deeper diesel exhaust tone. It connects downstream of the factory turbo downpipe and replaces the exhaust system toward the rear of the truck.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eChoose a straight-through configuration for a louder, more aggressive sound or the muffler-equipped option for more controlled exhaust volume. This system does not fit Cab \u0026amp; Chassis trucks, and some shorter wheelbase configurations may require pipe trimming.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0783\/6526\/2077\/files\/ChatGPT_Image_2026_8_11_14_02_57.png?v=1786428194\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e4-Inch Downpipe-Back Design:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eConnects downstream of the factory turbo downpipe and replaces the exhaust system toward the rear of the truck.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eLB7, LLY, and LBZ Fitment:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eDesigned for compatible 2001–2007 Chevrolet Silverado and GMC Sierra heavy-duty pickups with the 6.6L Duramax engine.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePre-DPF Exhaust Application:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe listed LB7, LLY, and LBZ applications were not factory-equipped with a diesel particulate filter. This product is a downpipe-back exhaust system rather than a DPF delete pipe.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eT409 Stainless Steel Construction:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eBuilt for durability under high exhaust temperatures and exposure to demanding road conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMandrel-Bent Tubing:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eSmooth bends help maintain a consistent internal pipe diameter through curved exhaust sections.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMuffler and Non-Muffler Options:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eChoose between a louder straight-through system and a muffler-equipped configuration with more controlled sound.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDesigned for Freer Exhaust Flow:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe 4-inch tubing provides a less restrictive exhaust path than many factory configurations. Actual results vary according to vehicle condition and setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eAvailable Options\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eOption\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eMuffler\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eSound Profile\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e4\" Downpipe-Back\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eNo\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eLouder and more aggressive\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e4\" Downpipe-Back + Muffler\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYes\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDeeper, more controlled volume\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cspan\u003e4\" Downpipe-Back\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe non-muffler configuration provides a louder diesel exhaust note and more noticeable turbo sound.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e4\" Downpipe-Back + Muffler\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe muffler-equipped configuration helps control overall exhaust volume while retaining a deeper tone than the factory exhaust. It may be more suitable for regular driving, towing, and longer highway trips.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eActual sound varies depending on engine code, cab style, bed length, original exhaust layout, and other modifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSpecification\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDetail\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProduct Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDownpipe-back exhaust system\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel Years\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2001–2007\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eVehicle Models\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eChevrolet Silverado and GMC Sierra 2500HD\/3500\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eEngine\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e6.6L Duramax V8\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eEngine Codes\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eLB7, LLY, and LBZ\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePipe Diameter\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 inch\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMaterial\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eT409 stainless steel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eWall Thickness\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eApproximately 2 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eConstruction\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMandrel-bent tubing\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMuffler\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOption-dependent\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCab \u0026amp; Chassis Fitment\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eNot compatible\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\u003cspan\u003eVehicle Fitment\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003e2001–2004 LB7 Duramax\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eChevrolet Silverado 2500HD\/3500 with 6.6L Duramax LB7\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGMC Sierra 2500HD\/3500 with 6.6L Duramax LB7\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003e2004.5–2005 LLY Duramax\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eChevrolet Silverado 2500HD\/3500 with 6.6L Duramax LLY\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGMC Sierra 2500HD\/3500 with 6.6L Duramax LLY\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003e2006–2007 LBZ Duramax\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eChevrolet Silverado 2500HD\/3500 with 6.6L Duramax LBZ\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGMC Sierra 2500HD\/3500 with 6.6L Duramax LBZ\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eImportant Fitment Notes\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eDoes not fit Cab \u0026amp; Chassis models.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eWhat’s Included\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eDepending on the selected configuration, the package includes:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e4-inch downpipe-back exhaust pipe sections\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eExhaust clamps\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eExhaust hangers\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMuffler with the option specifically labeled “+ Muffler”\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eSome factory mounting hardware may need to be reused during installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAn exhaust tip, sensors, gaskets, bolts, adapters, and other unlisted components are not confirmed as included.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eInstallation Notes\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eConfirm your truck’s engine code and original exhaust layout before removing the factory exhaust. This system connects downstream of the factory turbo downpipe and does not replace the turbo downpipe itself.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMinor cutting or trimming may be required for certain short-wheelbase, cab, or bed configurations. Test-fit and align all exhaust sections before cutting or fully tightening the clamps.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe available product information does not confirm whether welding is required. Some factory mounting hardware may need to be reused during installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eInstallation time varies depending on vehicle condition, corrosion, exhaust layout, available tools, and installer experience. Professional installation is recommended.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAfter installation, inspect clearance around the frame, suspension, spare tire, fuel lines, brake lines, wiring, and body. Recheck and retighten all exhaust connections after the first complete heat cycle.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eFrequently Asked Questions\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eIs this a DPF delete pipe?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eNo. The listed LB7, LLY, and LBZ applications were not factory-equipped with a DPF. This product is a 4-inch downpipe-back exhaust system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDoes this system replace the factory turbo downpipe?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eNo. It connects downstream of the factory turbo downpipe and is not a turbo-back exhaust system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWhat is the difference between the two options?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe standard option does not include a muffler and produces a louder exhaust note. The “+ Muffler” option includes a muffler for more controlled sound.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWhich option is better for regular driving or towing?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe muffler-equipped option may be more suitable for regular driving, towing, and long highway trips because it helps control exhaust volume.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDoes this system remove the catalytic converter?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eIt may replace the factory catalytic-converter section on equipped trucks. Original exhaust layouts can vary, so inspect your truck and confirm the product configuration before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDoes the package include an exhaust tip?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eAn exhaust tip is not listed as included.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWill cutting be required?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eSome shorter cab, bed, or wheelbase configurations may require trimming an intermediate pipe. Test-fit the system before cutting.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eIs welding required?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe available product information does not confirm whether welding is required. Inspect the supplied connections before installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAre clamps and hangers included?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eYes. Exhaust clamps and hangers are listed as included. Exact quantities may vary by configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDoes this system fit Cab \u0026amp; Chassis trucks?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eNo. This system is not compatible with Cab \u0026amp; Chassis applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eIs additional vehicle calibration required?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA DPF-specific calibration is not applicable because these engines were not factory-equipped with a DPF. However, changing or removing emissions-related exhaust components may affect vehicle diagnostics on some applications. Consult a qualified professional before installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eCompliance Notice\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThis product may alter or replace factory emissions-related exhaust components. The purchaser and installer are responsible for confirming compliance with all applicable federal, state, and local laws before purchase, installation, or use.\u003c\/span\u003e\u003c\/p\u003e","brand":"DieselPerf","offers":[{"title":"4\" Downpipe-Back(2001-2007)","offer_id":47384592810237,"sku":"DIPSJ-013","price":435.0,"currency_code":"USD","in_stock":true},{"title":"4\" Downpipe-Back(2001-2007)+Muffler","offer_id":47411444809981,"sku":"DIPSJ-013M","price":535.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/6526\/2077\/files\/Gemini_Generated_Image_xggfipxggfipxggf.png?v=1791088144"},{"product_id":"2001-2007-6-6l-gm-duramax-lb7-lly-lbz-5-downpipe-back-dpf-delete-pipe","title":"2001-2007 6.6L GM Duramax LB7 LLY LBZ 5'' Downpipe-Back Exhaust","description":"\u003cp\u003e\u003cspan\u003eUpgrade your \u003cstrong\u003e2001–2007 Chevrolet Silverado or GMC Sierra 2500HD\/3500HD\u003c\/strong\u003e with this 5-inch downpipe-back exhaust system for the \u003cstrong\u003e6.6L Duramax LB7, LLY, and LBZ\u003c\/strong\u003e engines.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eConstructed from T409 stainless steel, the system uses mandrel-bent 5-inch tubing to create a larger exhaust path and a deeper diesel exhaust tone. It connects downstream of the factory turbo downpipe and is available with or without a muffler.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis is a pre-DPF Duramax exhaust system and should not be classified as a DPF delete pipe. It does not fit Cab \u0026amp; Chassis trucks, and some shorter wheelbase configurations may require pipe trimming during installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0783\/6526\/2077\/files\/ChatGPT_Image_2026_8_11_14_02_57.png?v=1786428194\" alt=\"CHECK YOUR INLET CONNECTION BEFORE YOU ORDER\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e5-Inch Exhaust Tubing:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eProvides a larger exhaust path and a deeper overall exhaust tone than smaller-diameter systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDownpipe-Back Design:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eConnects downstream of the factory turbo downpipe and replaces the exhaust system toward the rear of the truck.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMuffler and Non-Muffler Options:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eChoose the non-muffler configuration for a louder, more aggressive sound or the muffler-equipped version for more controlled volume.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eT409 Stainless Steel Construction:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eDesigned to withstand high exhaust temperatures, road exposure, and demanding diesel truck use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMandrel-Bent Pipe Sections:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eSmooth bends help maintain a consistent internal diameter throughout the exhaust path.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHeavy-Duty Construction:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eApproximately 2 mm pipe walls provide added strength and structural durability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDesigned for Freer Exhaust Flow:\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe larger pipe diameter and smooth bends are designed to reduce restrictive exhaust flow. Actual results vary by vehicle condition and configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eAvailable Options\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eOption\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003ePipe Size\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eMuffler\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cspan\u003e5\" Downpipe-Back\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cspan\u003e5 inch\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cspan\u003eNo\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cspan\u003e5\" Downpipe-Back w\/Muffler\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cspan\u003e5 inch\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cspan\u003eYes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003eThe non-muffler option produces a louder and more direct exhaust note.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe muffler-equipped option retains the deep 5-inch tone while helping reduce overall volume, making it a more practical choice for daily driving, towing, and longer highway trips.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eActual sound varies based on cab style, bed length, engine condition, and other vehicle modifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cstrong\u003eDetail\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003e\u003cspan\u003eProduct Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDownpipe-back exhaust system\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003e\u003cspan\u003eModel Years\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2001–2007\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003e\u003cspan\u003eVehicle Models\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eChevrolet Silverado and GMC Sierra 2500HD\/3500HD\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003e\u003cspan\u003eEngine\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e6.6L Duramax V8\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003e\u003cspan\u003eEngine Codes\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eLB7, LLY and LBZ\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003e\u003cspan\u003ePipe Diameter\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5 inch\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003e\u003cspan\u003eMaterial\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eT409 stainless steel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003e\u003cspan\u003eWall Thickness\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eApproximately 2 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003e\u003cspan\u003eConstruction\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMandrel-bent tubing\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003e\u003cspan\u003eMuffler\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eOption-dependent\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cspan\u003eCab \u0026amp; Chassis Fitment\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e\u003cspan\u003eNot compatible\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\u003cspan\u003eVehicle Fitment\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eChevrolet Silverado\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e2001–2004 Silverado 2500HD\/3500HD with 6.6L Duramax LB7\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e2004.5–2005 Silverado 2500HD\/3500HD with 6.6L Duramax LLY\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e2006–2007 Silverado 2500HD\/3500HD with 6.6L Duramax LBZ\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eGMC Sierra\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e2001–2004 Sierra 2500HD\/3500HD with 6.6L Duramax LB7\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e2004.5–2005 Sierra 2500HD\/3500HD with 6.6L Duramax LLY\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e2006–2007 Sierra 2500HD\/3500HD with 6.6L Duramax LBZ\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eImportant Fitment Notes\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDoes not fit Cab \u0026amp; Chassis models.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eWhat’s Included\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e5-inch downpipe-back exhaust pipe sections\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eExhaust clamps\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eExhaust hangers\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMuffler with the option specifically labeled “w\/Muffler”\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe number and shape of individual pipe sections may vary by vehicle configuration and selected option.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eInstallation Notes\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThis system connects downstream of the factory turbo downpipe. It does not replace the turbo downpipe itself.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSome shorter cab, bed, or wheelbase configurations may require cutting or trimming an intermediate pipe. Test-fit and align the complete exhaust system before cutting or fully tightening the clamps.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eInstallation time varies depending on vehicle condition, corrosion, wheelbase, available tools, and installer experience. The product information does not confirm whether welding is required or whether any factory hardware must be reused.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAfter installation, check clearance around the frame, suspension, spare tire, brake lines, wiring, and body. Recheck and retighten all clamps after the first complete exhaust heat cycle.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eProfessional installation is recommended.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eFrequently Asked Questions\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eIs this a DPF delete pipe?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eNo. The listed LB7, LLY, and LBZ trucks are pre-DPF Duramax applications. This product is a 5-inch downpipe-back exhaust system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDoes this system replace the factory turbo downpipe?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eNo. It connects downstream of the factory turbo downpipe. It is not a turbo-back exhaust system.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWhat is the difference between the two options?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eBoth options use 5-inch tubing. The standard version does not include a muffler, while the “w\/Muffler” version includes a muffler for more controlled sound.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWhich option is louder?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe non-muffler version generally produces a louder and more aggressive exhaust note.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDoes the system include an exhaust tip?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eAn exhaust tip is not listed as included.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWill cutting be required?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eSome shorter cab, bed, or wheelbase configurations may require trimming an intermediate pipe. Test-fit the system before cutting.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eIs welding required?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe supplied product information does not confirm whether welding is required. Review the connection design before installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAre clamps and hangers included?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eYes. Exhaust clamps and hangers are listed as included.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eIs a tuner required?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA tuner is not automatically required for a conventional downpipe-back exhaust installation. Requirements may depend on the exact factory components being replaced and other vehicle modifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDoes this system fit Cab \u0026amp; Chassis trucks?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eNo. This system is not compatible with Cab \u0026amp; Chassis applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eCompliance Notice\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThis product may alter or replace factory exhaust or emissions-related components. The purchaser and installer are responsible for confirming compliance with all applicable federal, state, and local laws before purchase, installation, or use. \u003c\/span\u003e\u003c\/p\u003e","brand":"DieselPerf","offers":[{"title":"5\" Downpipe-Back（2001-2007）","offer_id":47384596119805,"sku":"DIPSJ-007","price":569.0,"currency_code":"USD","in_stock":true},{"title":"5\" Downpipe-Back w\/Muffler（2001-2007）","offer_id":47384596152573,"sku":"DIPSJ-007M","price":669.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/6526\/2077\/files\/DIPSJ-007_1a0c6d8f-30a2-4759-a743-6482e01b74d0.jpg?v=1791087595"}],"url":"https:\/\/dieselperf.com\/collections\/6-6l-duromox-lly-2004-2005.oembed","provider":"DieselPerf","version":"1.0","type":"link"}