EGR/DPF Delete Kit for 2017-2025 L5P 6.6L Duramax

Unlock maximum performance from your 2017–2025 Chevy/GMC 6.6L L5P Duramax with our premium EGR/DPF Delete Kit — a complete 2-in-1 upgrade engineered for off-road diesel power. By removing restrictive emissions components, this kit increases horsepower and torque, improves throttle response, enhances fuel efficiency, and lowers exhaust gas temperatures. The result is a cooler-running engine with reduced carbon buildup and fewer costly maintenance issues. A must-have solution for Duramax owners who demand stronger performance, long-term reliability, and a cleaner exhaust system.

Fitment

• 2017-2025 L5P 6.6L Duramax Diesel GMC Sierra 2500 HD
• 2017-2025 L5P 6.6L Duramax Diesel GMC Sierra 3500 HD
• 2017-2025 L5P 6.6L Duramax Diesel Chevrolet Silverado 2500 HD
• 2017-2025 L5P 6.6L Duramax Diesel Chevrolet Silverado 3500 HD

6.6L Duramax L5P DP-Back must be used together with our downpipe. The factory downpipe has an integrated SCR assembly and cannot be connected directly. Ours must be installed first to allow proper attachment of the subsequent exhaust section.

Key Features

• Dual Functionality – Merges EGR and DPF deletes into one full emissions solution.
• Enhanced Performance – Cuts exhaust backpressure for better throttle response, horsepower, and fuel economy.
• Cooler Operation – Stops EGR heat buildup, easing engine stress and prolonging life.
• Less Maintenance – Avoids DPF clogs and EGR carbon issues, cutting repair costs.
• Durable Build – Precision-made with robust parts for a perfect fit and lasting reliability.
• Tuner Compatible – Integrates smoothly with aftermarket tuning to maximize gains.

Delete Pipe/Exhaust Specification

Installation

Click here to see instruction on installing 2017-2025 6.6L Duramax L5P EGR delete kit

Click here to see instruction on installing 2017-2025 6.6L Duramax L5P DPF delete kit

How to Choose a DPF Delete?

4” vs 5” Straight Pipe Comparison

• 4-inch Straight 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 Straight 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

FAQs

Q. Is DPF & EGR Delete Legal?
⚠ For Off-Road/Race Use Only. In most regions, deleting emissions systems is illegal for on-road vehicles. Check local laws.

Q. Do I Need a Tuner After Installation?
Yes, an ECU tuner is required to disable error codes and optimize performance.

Q. Will Deleting Affect Turbo Lifespan?
On the contrary, it may extend turbo life by reducing exhaust backpressure and stress.

Q. How Much Fuel Economy Improvement?
Typically 10-15% improvement, depending on driving style and tuning.

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.