2017-2023 Duramax L5P Dirty 3.5" Downpipe (L5P-EXH-A004)2017 2023 Duramax L5P Dirty 3. 5" Downpipe (L5P EXH A004) Elevate your L5Ps performance and ditch the bottleneck. The factory L5P downpipe is notoriously restrictive, featuring a "crushed" profile that robs your engine of power and sends EGTs through the roof. The Dirty 3. 5" Downpipe is the solution, engineered to provide a smooth, high flow exhaust path directly from the turbo outlet. Constructed from full T304 stainless steel, this downpipe is

The manifold comes with all gaskets and turbo mounting hardware

600 lbs (compared to OEM pushrods at 1

so you can trust that it's built to last

Not Required for Common Rail Engines or any engine with straight-cut (spur) gears

Meant for increased all around efficiency

The PowerHouse LS 5

improving fuel flow to the heads and giving back some valuable engine valley room

Exceeds API Service Categories for heavy-duty-diesel engine oil: CK-4

000 lbs—nearly triple the OEM rating of 1

Part Type: Camshaft Bearing Sets

Engine machine shop packages are available with this kit

Featuring a 3-piece design with a robust 12mm diameter and