2017-2025 6.6L GM Duramax LML CCV Reroute Delete Kit

Technical Fitment & Sealing

Q1: How does this kit achieve a leak-proof seal? Do I need the original gasket?

• A: Our baffle plate is equipped with a high-temperature rubber gasket to ensure primary sealing. Pro-Tip: We recommend retaining your factory O-ring/gasket if it is in good condition. Keeping the original gasket creates an additional compression layer, which helps the system better handle the high vibrations and thermal expansion typical of the 6.6L Duramax engine.

Q2: Will a CCV reroute affect my fuel economy (MPG)?

• A: A Crankcase Ventilation (CCV) reroute can help maintain and potentially improve fuel economy by keeping your intake system bone-dry. By preventing oil mist from coating your turbocharger and intercooler, the engine maintains optimal airflow and sensor accuracy, leading to more efficient combustion over time.

Q3: How else can I improve the fuel economy of my Duramax engine?

• A: To maximize MPGs and engine efficiency, we recommend:Regular vehicle maintenance and using high-quality diesel fuel.Maintaining proper tire pressure and using low-friction synthetic engine oil.Upgrading to performance parts like high-flow intake systems or intercooler kits.Ensuring the intercooler and MAP sensors are free of oil-sludge clogs.

Reliability & Performance

Q4: Will a PCV valve delete kit really help extend my engine's life?

• A: Yes. By stopping oil-saturated vapors from entering the intake, you prevent carbon buildup on intake valves and the turbo compressor wheel. This leads to a cleaner combustion chamber, healthier turbocharger operation, and reduced wear on critical engine components over the long term.

Q5: What exactly is CCV rerouting?

• A: A CCV reroute diverts oily crankcase "blow-by" gases away from the intake system. On a stock Duramax, these gases are dumped back into the turbo mouthpiece, creating sludge in the intake manifold and intercooler. Rerouting these gases ensures consistent airflow and keeps your entire charge-air system clean for optimal performance.

Q6: Can this kit be used on high-mileage engines?

• A: Absolutely. In fact, high-mileage Duramax engines (LB7, LLY, LBZ, LMM, LML, L5P) benefit the most. As engines age, "blow-by" naturally increases, dumping more oil into the intake. Installing this kit on an older truck is one of the most effective ways to stop further carbon accumulation and "freshen up" engine breathing.

Legal & Warranty Information

Q7: Is this kit legal for street use?

• A: No. This kit is sold strictly for OFF-ROAD / RACING USE ONLY. Federal laws prohibit the modification or disabling of emission control systems on vehicles operated on public roads. This product is intended exclusively for dedicated race, off-road, or high-performance applications where emissions regulations do not apply.

Q8: Will this kit void my vehicle’s warranty?

• A: Modifying emission-related systems like the PCV/CCV may void the manufacturer’s powertrain warranty. While some dealerships are more lenient with minor modifications, others may deny warranty claims if a reroute kit is detected. We recommend consulting your local service advisor if you have concerns regarding your specific warranty coverage.

Shipping & Delivery Policy

At DieselPerf, we specialize in high-performance diesel emission system accessories. Our mission is simple: to deliver the parts you need with maximum efficiency, security, and transparency. Below are the guidelines we follow to ensure your order reaches you safely.

1. Perfecting Your Delivery

To ensure a seamless experience and avoid unnecessary surcharges, please keep the following in mind:

• Precision Matters: Always verify your shipping address at checkout. Accurate data prevents costly rerouting fees.
• Address Classification: Carriers determine rates based on zoning. If your business is located in a residential area, it will be classified and billed at the Residential Delivery rate.
• Stay Reachable: Please provide a valid phone number. Carriers often need to coordinate delivery windows; missed connections can lead to significant delays.

2. Order Consolidation

To get your parts to you as fast as possible, we ship items as they become available. This means your order may arrive in multiple packages. Rest assured, you will never be charged extra for these split shipments.

3. Our Logistics Network

We partner with world-class carriers, including UPS, FedEx, DHL, USPS, and Amazon Logistics.

• Global Fulfillment: We fulfill orders from our strategic hubs in the U.S. and Hong Kong, prioritizing the location closest to you.
• Lead Times: While most orders arrive within 5–15 business days, specialty items or factory-direct shipments may require additional transit time.

4. Damaged or Missing Shipments

Your satisfaction is our priority. If your order arrives compromised, please follow this protocol:

For Damaged/Incomplete Deliveries:

1. Document Immediately: Note any visible damage or missing pieces on the delivery receipt before signing.
2. Contact Us: Reach out within 2 business days at service@DieselPerf.com or via phone at +1 325-013-1608 / +852 5381 0098.
3. Preserve Evidence: Keep all original packaging and take clear photos of the damage to expedite your claim.

For Lost Shipments:
If a package goes missing, we will initiate a dock check with the carrier (typically taking 2–7 business days). If the items cannot be located, we will work with you to provide a full replacement or a refund.

5. Estimated Timeframes

• Processing: Orders are generally dispatched from our warehouse within 1–2 business days.
• Transit: Standard U.S. ground shipping typically takes 7–10 business days, though many items arrive sooner.
• Holiday & External Factors: Please account for seasonal peaks (Christmas, Thanksgiving, etc.) and unforeseen "Force Majeure" events like extreme weather, which may naturally extend delivery windows.

Customer Support

Our team is here to help you get back on the road.

• Hours: Monday – Friday | 9:00 AM – 6:00 PM
• Email: service@DieselPerf.com

All Dieselperf products enjoy a 1-year limited warranty starting from the date of goods receipt, covering defects in product materials and workmanship.

Warranty Coverage

This warranty only covers failures arising from original material and manufacturing defects under proper installation and normal use. The warranty is non-transferable and exclusively available to the original buyer. An order number or valid purchase receipt is mandatory for warranty claims.

Warranty Exclusions

The 1-year limited warranty does not apply to the following circumstances:

• Normal wear and tear and surface scratches generated during regular use
• Damage caused by improper installation, unauthorized disassembly or modification
• Damage resulting from misuse, accidental impact, negligence and natural disasters
• Natural aging loss of consumable spare parts
• Labor costs incurred from product disassembly, assembly and maintenance

Warranty Claim Process

1. Submit Application: Email customer service with your order number, detailed fault description and clear photos or videos of product defects.
2. Claim Review: Our technical team will verify the issue. Additional information or product return inspection may be required.
3. Settlement Solutions: Upon claim approval, we reserve the right to take one of the following measures:

• Repair the defective product
• Replace with a brand-new authentic item
• Deliver compatible replacement parts for repair

Limitation of Liability

Within the scope permitted by law, Dieselperf shall not be responsible for any special, incidental, indirect or consequential losses, including but not limited to profit losses, business suspension losses and other economic damages.