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

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 connect directly. Ours must be installed first to allow proper attachment of the subsequent exhaust section.

Description

Boost performance and longevity for your 2017-2025 6.6L L5P Duramax with our EGR/DPF 2-in-1 Delete Kit. By removing restrictive emissions systems, it enhances horsepower, torque, and fuel efficiency while lowering engine heat and maintenance. Ideal for diesel owners pursuing peak engine performance and durability.

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.

Specification

With or Without High Flow Intake Elbow Pipe?

EGR Delete Kit WITH High Flow Intake Elbow Pipe

• Improved Airflow: Reduces intake restriction, increases air volume, and enhances turbo response for smoother power delivery.
• Lower Intake Temps: Optimized elbow design helps reduce air intake temperatures, improving combustion efficiency.
• Performance-Oriented: Ideal for tuned engines, larger turbos, or other upgrades to maximize power potential.

EGR Delete Kit WITHOUT High Flow Intake Elbow Pipe

• EGR Removal Only: Solves carbon buildup and overheating issues but retains the stock intake system.
• Budget-Friendly: Lower cost, suitable for users not seeking extra airflow upgrades.
• Daily Driving Focus: Meets basic power and fuel economy needs but offers limited airflow improvement.

Best For

• High-flow version: Performance builds, towing, or tuned trucks needing better airflow.
• Standard version: Daily drivers prioritizing reliability and basic EGR-related fixes.

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

FAQ

Q1. Is DPF & EGR Delete Legal?
A1. ⚠ For Off-Road/Race Use Only. In most regions, deleting emissions systems is illegal for on-road vehicles. Check local laws.

Q2. Do I Need a Tune After Installation?
A2. Yes, an ECU tune is required to disable error codes and optimize performance.

Q3. Will Deleting Affect Turbo Lifespan?
A3. On the contrary, it may extend turbo life by reducing exhaust backpressure and stress.

Q4. How Much Fuel Economy Improvement?
A4. Typically 10-15% improvement, depending on driving style and tuning.