2019-2021 Cummins 6.7L All-in-One Delete Kit: DPF, EGR, DEF, CCV & Tuner

System Specifications & Materials

Q1: What’s the difference between 4-inch and 5-inch exhaust systems for Ram 6.7L Diesel trucks?

• 4-inch Systems: The "Gold Standard" for stock or moderately tuned Ram 2500/3500 trucks. It maintains the necessary backpressure to optimize low-end torque, making it ideal for daily driving and consistent towing.
• 5-inch Systems: Engineered for high-horsepower builds (500+ HP) and extreme performance. These systems maximize exhaust flow to aggressively lower Exhaust Gas Temperatures (EGTs) and provide the deepest, most aggressive Cummins exhaust note.

Q2: Can a magnet stick to this pipe? Is it genuine stainless steel?

• Yes. This system is crafted from T-409 Stainless Steel. Unlike 304-grade (non-magnetic), T-409 is a magnetic ferritic stainless steel specifically engineered for the high-heat cycles of a diesel exhaust. It offers superior corrosion resistance over aluminized steel and is the industry standard for durability in the "Salt Belt" and humid regions.

Q3: How thick is the exhaust pipe, and what is its expected lifespan?

• The pipe features a heavy-duty 14-gauge (approx. 2mm) wall thickness. Built from durable T-409 stainless, it is designed to withstand the heavy vibrations of the 6.7L Cummins and resist rust and heat fatigue for years of reliable, hard use.

Q4: Does the Ram 3500 DPF Delete Kit come with a muffler?

• We offer both Muffled and Straight-Pipe configurations.Muffled: Reduces in-cab drone, making it the preferred choice for long-distance highway towing.Straight-Pipe: Delivers a raw, aggressive exhaust tone favored by off-road enthusiasts and competition builds.

Performance & Tuning

Q5: What’s included in the Dodge Ram 6.7L Diesel DPF Delete Kit?

• Each kit is a complete bolt-on solution and includes: (2) mandrel-bent exhaust pipes, (2) heavy-duty clamps, (1) secure hanger, and (3) high-strength bolts. No extra components are needed for standard installations.

Q6: What specific performance benefits will I see on my Ram 6.7L?

• By removing the restrictive DPF and CAT, you unlock:Faster Turbo Spool: Quicker throttle response and less turbo lag.Lower EGTs: Critical for protecting engine components under heavy loads.Improved Fuel Efficiency: Significant MPG gains when paired with proper tuning.Reliability: Eliminates DPF clogging and the "Limp Mode" associated with failed regeneration cycles.

Q7: How much MPG gain can I expect on my Ram 2500?

• While results depend on your specific setup and driving habits, many Ram 6.7L owners report jumping from 13–14 MPG (stock) to as high as 18–19 MPG after installation and proper ECU remapping.

Q8: Do I need a tuner for this DPF Delete Kit to work?

• Yes, absolutely. Removing emissions equipment requires a DPF-off tuner (such as EFI Live or EZ Lynk). Without a tune, the truck will trigger a Check Engine Light, enter "Limp Mode," and potentially suffer engine damage.

Installation & Legal Information

Q9: Can I install this kit at home on my Ram 2500/3500?

• Yes. Most owners can complete the installation in about 1 hour using basic hand tools. The direct-fit design utilizes factory mounting points, so no professional lift or specialized shop equipment is required for most models.

Q10: Can I legally drive my truck with this DPF delete kit on public roads?

• ⚠️ WARNING: OFF-ROAD / RACING USE ONLY. Removing the Diesel Particulate Filter (DPF) is a violation of U.S. EPA and CARB emissions regulations. These kits are intended strictly for closed-course competition or non-road use. Using this on public highways can result in significant fines and failed emissions inspections. Always verify your local and state laws.

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.