COMPATIBLE: (6.6L - L5P)

2017 -2023 CHEVROLET SILVERADO 

2017 - 2023 GMC SIERRA

Note: Will not fit Cab & Chassis trucks

Unlock the full potential of your L5P Duramax 6.6L engine with the 3.5" Downpipe Exhaust. Designed specifically for the 2017-2023 Chevy and GMC models, this high-flow downpipe improves exhaust flow, reduces turbo lag, and increases horsepower. Made from durable stainless steel with a mirror-polished finish, it optimizes turbocharger efficiency and boosts engine performance. Perfect for those looking to enhance their L5P Duramax 6.6L's power, responsiveness, and overall driving experience. Whether you're towing or racing, this downpipe is the ideal upgrade for your engine. 

3.5" Stainless Steel Piping 20% better flow than the factory pipe Heat wrap included keeping engine bay temperatures down Greater heat-retention Will not affect emissions systems Maximum flow for competition applications 4-bolt flange, two studs installed 

The downpipe is a critical part of your Duramax 6.6L diesel engine, responsible for channeling exhaust gases from the turbocharger turbine housing into the exhaust system. When upgraded, the downpipe typically features a larger diameter than the factory version, which allows for improved exhaust flow. Some high-performance versions also replace or eliminate the catalytic converter for even better efficiency. By swapping out the factory downpipe for a high-flow option, you allow your engine to expel exhaust gases more efficiently, reducing turbo lag and increasing horsepower. The stock downpipe can act as a bottleneck, restricting exhaust flow and limiting engine performance. An upgraded L5P downpipe removes this restriction, enabling quicker turbo spool, higher boost levels, and ultimately unlocking more power from your Duramax diesel engine.