Seguler 4" DPF Delete pipe & 3.5" Downpipe w/EGR Delete kit for 2017-2019 6.6L Duramax L5P

FITMENT

• 2017-2019 6.6L Silverado & Sierra Duramax L5P 2500HD 3500HD Diesel engine trucks.
  
• Note: Will NOT fit Cab & Chassis commercial-style trucks.

DESCRIPTION

Product Overview

• Severe exhaust backpressure, trapped firewall heat, and exposed wiring harnesses hamper the power, efficiency, and durability of 2017+ L5P Duramax trucks. The crushed OEM downpipe and restrictive DPF choke off turbo exhaust flow, while the stock EGR cooler bakes intake runners in heavy carbon sludge and poses constant internal coolant leak threats.
  
• Uncork your engine’s full exhaust path and protect its electronics with this complete L5P Performance & Wiring Protection Package. Engineered to eliminate factory exhaust bottlenecks and bypass soot recirculation, this kit lowers towing EGTs, prevents intake sludge, and includes sealed dummy plugs to keep water, mud, and road grime out of your factory sensor connectors.
  

Key Features

• Pairs a smooth 4" DPF delete pipe with a 3.5" downpipe for stronger exhaust flow and quicker spool.
  
• Stops regen cycles and lowers EGTs by removing the primary backpressure from the factory emissions hardware.
  
• Pulls the EGR system to keep abrasive soot out of the intake and eliminate carbon buildup and cooler leaks.
  
• Includes CAN-bus plugs to seal the open factory sensor connectors and protect the wiring.

FAQ

Q: Will this fit the 2020+ L5P? 

A: No, it’s built for the 2017–2019 model years only. The 2020–2023 trucks use a different factory configuration, so those need their own dedicated kit.

Q: Do I need a custom tune after install? 

A: Yes. Removing the factory emissions parts will throw codes and derate the engine until a delete tune is flashed to disable those sensors.

Q: Is the downpipe included? 

A: Yes — the kit comes with a 3.5" downpipe, the 4" DPF delete pipe, EGR delete components, and CAN-bus plugs as a complete package.

Q: Will it change the exhaust sound? 

A: Yes. With the restrictive DPF gone, you’ll get a deeper diesel tone and a more aggressive note, along with noticeably less backpressure than the factory system.