Twisted Steel Headers Up-Pipes & Down-Pipe Combination is an all-in-one kit for your 2004.5-2010 GM/Duramax. Upgrade your original equipped exhaust manifolds and up-pipes with the tubular style manifolds from AFE. Constructed from 1-3/4" 304 stainless steel, the mandrel-bent design allows the most flow providing increased spool-up and performance. Bolted to the manifolds are the 2" up-pipes also built from 304 stainless steel. While the manifolds and up-pipes feed your turbo, the AFE Down-pipe features a 3" construction to provide a smooth flowing exit for your exhaust gases.
1/2" Laser-Cut Flanges:
These headers come with 1/2" thick laser-cut head flanges that are designed to match the head port for a leak-free seal
These unique headers are constructed of 1-3/4" mandrel-bent 304 stainless steel tubing with a .120" wall for strength and durability.
Optimized Tube Lengths:
Tube lengths are optimized for true pulse control technology which improves flow and performance.
These unique headers are constructed of 2" mandrel-bent 304 stainless steel tubing with a .120" wall for strength and durability.
The down-pipes utilizes heavy duty 4" flex tubes with internal interlock liners.
High quality 3/8" thick flanges are used for a complete 360 degree sealing surface.
*The Down-Pipe is constructed of 3" mandrel-bent 304 stainless steel tubing for unrestricted flow.
*100% TIG-Welded for strength and durability. TIG-Welding is the strongest weld available, reducing stress cracks.
*Kit Includes: nuts, bolts and a dipstick/tube for clearance.