EGR/DPF/Downpipe/CAN BUS Plug Delete 2017-2025 L5P 6.6L Duramax All-in-One Kit

EGR/DPF/Downpipe/CAN BUS Plug Delete 2017-2025 L5P 6.6L Duramax All-in-One Kit

This EGR/DPF/Downpipe/CAN BUS Plug Delete 2017-2025 L5P 6.6L Duramax All-in-One Kit allows removal of the catalytic converter and DPF filter from the exhaust system, and allows for more efficient removal of oil from the CCV supply line using two integrated differential drop devices in the CCV block. With reduced exhaust backpressure, a DPF delete enhances exhaust flow, thereby boosting your engine's performance.

Keep the CAN-BUS alive to the fuel tank and maintain normal ECU operation for fuel tank/lift pump data.

Fitment

• GMC Sierra
• 2017 L5P 6.6L Duramax Diesel GMC Sierra 2500 3500 HD
• 2018 L5P 6.6L Duramax Diesel GMC Sierra 2500 3500 HD
• 2019 L5P 6.6L Duramax Diesel GMC Sierra 2500 3500 HD
• 2020 L5P 6.6L Duramax Diesel GMC Sierra 2500 3500 HD
• 2021 L5P 6.6L Duramax Diesel GMC Sierra 2500 3500 HD
• 2022 L5P 6.6L Duramax Diesel GMC Sierra 2500 3500 HD
• 2023 L5P 6.6L Duramax Diesel GMC Sierra 2500 3500 HD
• 2024 L5P 6.6L Duramax Diesel GMC Sierra 2500 3500 HD
• 2025 L5P 6.6L Duramax Diesel GMC Sierra 2500 3500 HD
• Chevrolet Silverado
• 2017 L5P 6.6L Duramax Diesel Chevrolet Silverado 2500 3500 H
• 2018 L5P 6.6L Duramax Diesel Chevrolet Silverado 2500 3500 HD
• 2019 L5P 6.6L Duramax Diesel Chevrolet Silverado 2500 3500 HD
• 2020 L5P 6.6L Duramax Diesel Chevrolet Silverado 2500 3500 HD
• 2021 L5P 6.6L Duramax Diesel Chevrolet Silverado 2500 3500 HD
• 2022 L5P 6.6L Duramax Diesel Chevrolet Silverado 2500 3500 HD
• 2023 L5P 6.6L Duramax Diesel Chevrolet Silverado 2500 3500 HD
• 2024 L5P 6.6L Duramax Diesel Chevrolet Silverado 2500 3500 HD
• 2025 L5P 6.6L Duramax Diesel Chevrolet Silverado 2500 3500 HD
  

Note: To Ensure Correct Fitment for Your 2017-2019 Duramax, check the color of the CAN bus plug on your vehicle: black vehicle plug -> order the BLACK kit, white vehicle plug -> order the WHITE kit. Kits are color-specific and will not work if the color is mismatched.

Key Benefits

• Free-flowing exhaust system for more power and better fuel economy
• Improved combustion chamber temperatures
• Better longevity of your engine's cooling and exhaust system
• Increased power from more powerful tune flashes
• All the necessary parts needed to fully delete your 2017-2025 L5P 6.6L Duramax Diesel GMC Sierra 2500 3500 HD or 2017-2025 L5P 6.6L Duramax Diesel Chevrolet Silverado 2500 3500 HD

Package Include

• EGR Delete Kit
• DPF Delete Kit 
• Downpipe Exhaust
  

• CAN BUS Plug Kit (2017+ L5P 6.6 Duramax Chevy GMC)

• ⚠️Note: Accessories vary by order and may not include all listed.

EGR Delete Kit Specification

DPF Delete Kit Specification

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

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

Downpipe Exhaust Specification

• Material: Stainless Steel
• Surface: Mirror Polish

OE vs. DPFexhaust Downpipe

What's the Difference Between a Downpipe and an Exhaust?

Upgrading the downpipe = performance and throttle response
Upgrading the exhaust = tone, flow, and backpressure control

CAN BUS Plug Kit Specification

Installation

L5P 6.6 Duramax 4" DPF Downpipe Installation Guide

L5P 6.6 Duramax EGR Delete Installation Guide

FAQs

Q. Is this L5P Delete Kit compatible with all 2017-2025 L5P Duramax models?
Yes, this kit is specifically designed to fit all 2017–2025 GMC Sierra 2500/3500 HD and Chevrolet Silverado 2500/3500 HD trucks equipped with the 6.6L L5P Duramax diesel engine. Whether you have a 2017 or a 2025 model, the fitment is seamless.

Q. Does this kit include everything needed to fully delete the EGR and DPF systems?
Absolutely. The package includes a complete EGR delete kit, DPF delete race pipe, downpipe, up-pipe, and a CAN BUS plug tailored for the 2017–2025 L5P. This is a full delete solution, engineered for performance and reliability.

Q. Will I need to tune my ECU after installing this kit?
Yes. A custom ECU tune is required after installation to disable the EGR/DPF functions and related trouble codes. We strongly recommend pairing this kit with a quality tuning solution to fully unlock the benefits and prevent warning lights.

Q. Are there any differences between the 2020 L5P Delete Kit and other model years?
The core components remain consistent, but the CAN BUS plug design varies slightly between 2017–2019 and 2020–2025 models. DPFExhaust provides year-specific parts to ensure plug-and-play compatibility for your truck.

Q. What impact does deleting the EGR and DPF have on the engine and turbo system?
Removing the EGR and DPF reduces exhaust backpressure, improves turbo response, lowers combustion temps, and significantly reduces carbon buildup. This results in better reliability and longer life for your engine and turbo system.

Q. How much horsepower and torque gain can I expect with this kit?
Depending on your tune and setup, you can expect gains of 50-100+ horsepower and 100-150 lb-ft of torque. Results will vary based on vehicle condition and tuning strategy.

Q. Is this kit street-legal?
This product is intended for off-road, competition, or agricultural/industrial use only. Removing emissions equipment is illegal on public roads in many states. Please check and comply with your local regulations before purchase or installation.

Q. How difficult is the installation? Can I do it myself?
Installation requires solid mechanical knowledge and experience. Because it involves exhaust modification and ECU tuning, we highly recommend having a professional mechanic perform the installation to ensure everything runs safely and correctly.

Q. What materials are used in DPFExhaust’s L5P Duramax Delete Kit?
We use high-grade stainless steel for the downpipe and DPF delete pipes, with precision laser-cut flanges and TIG welding to ensure durability, corrosion resistance, and long-lasting performance under heavy-duty conditions.

Q. After installing the 2017-2025 L5P 6.6 Duramax Delete Kit, will there be any extra maintenance needed?
Overall, maintenance becomes easier. Without DPF regeneration and EGR soot buildup, oil contamination is reduced, and the turbo and intake system stay cleaner. We recommend periodic inspection of exhaust flanges and welds for tightness and integrity.

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.