4"/5" 2017+ L5P 6.6 Duramax DPF Delete Race Pipe Chevy GMC

4"/5" DPF Delete Pipe for 2017+ L5P 6.6 Duramax Chevy and GMC

If you’re looking to improve fuel efficiency, reduce maintenance, and experience a serious boost in performance, this DPF delete race pipe kit is a game-changer for your Chevy/GMC. Say goodbye to restrictive emissions controls and hello to optimized power. For off-road and competition use only. All DPF delete pipes are made from T-409 stainless steel, a tough, corrosion-resistant option that’s built to last.

Fitment

2017+ L5p 6.6 Duramax GMC Sierra/Chevrolet Silverado 2500 HD/3500 HD

Fits short bed and long bed models

*Not compatible with 3500/4500/5500 commercial trucks. 

Benefits of DPF Delete

Boost Fuel Efficiency

Eliminate DPF Maintenance Cost

Increase Power and Torque

DPF Pipe Style Description

4'' vs 5'' DPF Delete Pipe Comparison

• 4-inch Pipe: Produces a tighter, raspier exhaust note—especially noticeable at lower RPMs. Ideal for daily driving or mildly tuned trucks where excessive drone is undesirable.
• 5-inch Pipe: Delivers a deeper, more refined tone with less high-pitch resonance. Better suited for high-output builds and towing applications, where improved exhaust flow is beneficial.

Driver Feedback Summary

• The 4" pipe works well for stock or lightly modified trucks and a quieter cabin.
• The 5" pipe is perfect for aggressive builds, deep-tone enthusiasts, and those maximizing exhaust performance.

Types of DPF Delete Kits

DPF Race Delete

• Removes only the DPF (retains stock downpipe)
• Offers minimal performance gains but is the most budget-friendly
• Best for cost-conscious users or avoiding emissions testing

Downpipe-Back Delete

• Replaces the exhaust from the turbo downpipe back
• Improves mid-range power and throttle response
• Ideal for street builds using the stock turbo

Turbo-Back Delete

• Full system replacement starting from the turbo outlet
• Includes a high-flow downpipe for maximum efficiency
• Reduces turbo lag and boosts top-end power
• Top choice for tuned or high-performance engines

Dual Exit (5" only)

• Splits into dual exhaust paths
• Enhances cooling and flow for extreme conditions
• Commonly used in heavy towing or competition setups

Muffler vs. No Muffler

With Muffler

• Reduces exhaust noise for daily driving
• Slight power restriction (~5–10 HP)
• More likely to comply with local noise regulations

Straight Pipe (No Muffler)

• Loud, aggressive exhaust tone
• Unrestricted flow for maximum horsepower
• Often not street-legal due to noise and emissions rules
• Intended for off-road or race use only

Installation Guide & Tips

Click here for the installation guide.

*Tuning before installation is required to prevent any check engine lights or diagnostic codes. Compatible tuner: EZ LYNK Tune Package for L5p Duramax

FAQs

Q: Will DPF delete affect my engine?
A: Removing the DPF reduces backpressure, which is generally beneficial for engine performance. However, tuning is essential to ensure the engine operates smoothly and without error codes.

Q: What’s the difference between DEF delete and DPF delete?
A: DEF delete involves removing the diesel exhaust fluid system, while DPF delete removes the diesel particulate filter (DPF). Both impact emissions, but DPF delete tends to have a more direct impact on fuel economy and power.

Q: Do I still need tuning after DPF delete?
A: Yes, tuning is crucial after DPF removal to ensure your engine continues to run properly and that no warning lights or diagnostic codes interfere with performance.

Q: What does the "DPF race pipe" mean?

A: "DPF race pipe“also called "DPF Delete Pipe", only removes the part of DPF and keeps other parts.

Q: What does "DP-back/Downpipe-back" mean?

A: This means that the exhaust system runs from the downpipe all the way to the end of the exhaust pipe, replacing everything from the downpipe outlet back. This typically includes the mid-pipe, catalytic converter (if present), and muffler.

Q: What does "Turbo-back" mean?

A: This means that the exhaust system runs from the turbocharger all the way to the end of the exhaust pipe, replacing everything from the turbocharger outlet back. This typically includes the downpipe, mid-pipe, catalytic converter (if present), muffler, and tailpipe.

Q: What is your DPF made from? Stainless steel or aluminum?

A: They are made of 409 stainless steel.

Q: Do your DPF deletion kits need to purchase additional parts?

A: Our DPF delete kit comes with all the parts to complete the DPF deletion, normally, there is no need to purchase anything else.

Q: Does your DP-back pipe work with stock parts?

A: Yes, our Dp-back pipe can fit perfectly with the stock Downpipe and stock bolts.

Fast Shipping Policy

Your order will be dispatched within 1-2 business days, and the package will arrive within your order's estimated date. Click for Shipping Policy.

Easy Return Policy

Every order comes with a 14-day free return, which means you don't have to pay for a return slip. Click for Return Policy.