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Part #: AFE48-34008

AFE 48-34008 Twisted Steel Headers Up-Pipes & Down-Pipe Combo

2004.5-2010 GM 6.6L Duramax
Part #: AFE48-34008
$1,855.34 $ $1,669.81
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The AFE 48-34008 Twisted Steel Headers Up-Pipes & Down-Pipe Combo is an all-in-one kit for your 2004.5-2010 GM 6.6L 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.

4" Interlock Flex Pipes:
The down-pipes utilizes heavy duty 4" flex tubes with internal interlock liners.

Leak-Free Seal:
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.

All Components TIG-Welded:
100% TIG-Welded by certified craftsmen for race proven strength and durability. TIG-Welding provides the strongest welds reducing stress cracks.

Hassle-Free Installation:
For a hassle-free installation this kit includes nuts, bolts and a dipstick/tube for clearance. 

Features & Benefits 

  • Increased Flow 
  • Includes Headers, Up-Pipes & Down-Pipe 
  • 100% Hand TIG-Welded For Strength & Durability 
  • +67HP & 171 Ft-Lbs. (Verified by AFE In-House Dyno Test on 2006 LBZ) 
Application Notes: 
This combo kit requires EGR Race Kit.
This product is intended for off-road use only.


  • MFG. Number 48-34008
  • Manufacturer Name AFE
  • Shipping Weight 42.00 lb.
  • Shipping Length 49 in.
  • Shipping Width 13 in.
  • Shipping Height 23 in.
  • UPC 802959481585
  • Prop 65 WARNING: Cancer & Reproductive Harm -


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Most Popular Questions

Is there bungs welded to the parts form EGT sensors?
View Staff Answer 
Yes, there is a bung welded in place for an EGT probe.
Emissions Notice

This product is not legal for sale or street use in California. Certain aftermarket products are subject to governmental emission standards regulated by the California Air Resources Board. In order for these products to be legal on a specific vehicle in California, the part number must receive a CARB Executive Order (EO) number. This number makes the part legal for use only on specific years, makes and models of vehicles. A decal with CARB EO number for these parts must be displayed in the engine bay to satisfy smog inspection requirements.