Seguler DPF/CCV/EGR All-in-One Kit for 2017-2023 6.6L Duramax L5P

FITMENT

• 2017-2023 6.6L Silverado & Sierra Duramax L5P 2500HD 3500HD Diesel engine trucks.
  
• Note: Will NOT fit Cab & Chassis commercial-style trucks.

DESCRIPTION

Product Overview

• Factory L5P Duramax engines suffer from severe gas-exchange bottlenecks, intense under-hood heat, and double-source intake contamination. The pinched stock downpipe and dense DPF canister generate high backpressure that slows turbo spool and triggers fuel-wasting regenerations. Concurrently, the OEM EGR loop dumps hot exhaust soot while the CCV system feeds oily blow-by vapor into the fresh air inlet—blending inside the intake tract to form a thick, heat-baked carbon sludge.
  
• Precision-engineered to eliminate every major breathing restriction, this L5P Performance Package completely overhauls both your intake and exhaust flow paths. By replacing crushed exhaust geometry with a high-flow downpipe and permanently isolating both soot recirculation and crankcase oil mist, it lowers thermal stress, prevents power-robbing manifold buildup, and optimizes turbocharging efficiency.
  

Key Features

• Swaps the crushed factory downpipe and DPF canister for free-flowing 3.5" and 4"/5" piping, pulling exhaust temperatures down and putting an end to active DPF regenerations.
  
• Blocks both abrasive exhaust soot and sticky oil mist from meeting inside the intake manifold, preserving clean airflow and shielding the intercooler boots from oil degradation.
  
• Eases backpressure right at the turbine to let the VGT spool faster and deliver throttle response that feels crisp and immediate.
  
• Bundles your exact choice of downpipe, race exhaust, EGR delete, and CCV filtration into one order, so every piece arrives matched and ready to install together.

FAQ

Q: Is tuning needed after installing this kit? 

A: Yes. After installation, custom tuning is required to correctly recalibrate the vehicle’s ECM and ensure compatibility with the removed factory emission components. A compatible tuner is needed to clear related fault codes and optimize engine performance.

Q: What benefits come from installing this DPF/EGR/CCV kit? 

A: By removing restrictive factory emissions components, this kit improves airflow, lowers exhaust restriction, and keeps the intake clean. Paired with proper tuning, it enhances turbo response and overall diesel performance.

Q: Will this kit improve turbo spool-up? 

A: Yes. By reducing exhaust backpressure and improving exhaust flow, this kit helps the turbocharger run more efficiently, which can improve throttle response and turbo spool characteristics.

Q: Is anything else required beyond this kit for a complete installation?

A: The kit provides the primary hardware for the DPF, EGR cooler, and CCV system modifications. However, depending on your vehicle setup, custom tuning equipment and CAN Bus plugs may be needed to complete the communication loop.Depending on your vehicle's model year, you can complete your setup with either our 2017–2019 L5P CAN Bus Plugs or 2020–2023 L5P CAN Bus Plugs.