4"/5" DPF Delete Race Pipe for 2017-2025 L5P 6.6 Duramax Chevy/GMC

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

Improve fuel efficiency, reduce maintenance, and experience a serious boost in performance with our DPF delete race pipe kit. All DPF delete pipes are made from T-409 stainless steel, a tough, corrosion-resistant option that’s built to last. For off-road and competition use only.

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

Cut maintenance cost on DPF. No more need to service the DPF at regular intervals (cleaning, replacement).

Increase exhaust flow. And increases your motor's performance.

Increase power and torque for your truck.

DPF Pipe Style

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.

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

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

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

Check DPF Delete Race Pipe for 2017-2025 L5P 6.6 Duramax 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, and you need to tune your vehicle before removing OE emission system. Tuning is crucial for DPF removal, and it prevents warning lights or diagnostic codes from interfering with performance.

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

A: "DPF race pipe“also called "DPF Delete Pipe", it 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 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: No. Our 6.6L Duramax L5P DP-Back pipe must be used together with our downpipe. The factory downpipe has an integrated SCR assembly and cannot connect directly. Ours must be installed first to allow proper attachment of the subsequent exhaust section. Check L5p Duramax performance downpipe.

Free & 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.

Free & 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.