# aFe 01-04 GM V8-6.6L LB7 Twisted Steel Manifold w/ Up Pipe Construction: These unique up pipes are constructed of 2" mandrel-bent 304 stainless steel tubing with a .120" wall for strength and durability. 2" Inner Liner Flex Pipes: The down-pipes utilizes heavy duty 2" flex tubes with internal inner liner. Leak-Free Seal: High quality 3/8" thick flanges are used for a complete 360 degree sealing surface. Machined Ports: These manifolds have both the inlet and the outlet ports machined to match the factory gaskets. This allows for maximum flow, without compromising gasket performance. Auxiliary Ports: An Exhaust Gas Temperature (EGT) probe port is incorporated into each manifold for easy installation of gauges or testing equipment. There are three additional cast in bosses provided to allow for alternate testing points. Hassle-Free Installation: These manifolds are compatible with the stock up-pipes, which allows the manifolds to be installed without having to remove the turbocharger down-pipe or the up-pipes. - 1/8 in. NPT Exhaust Gas Temp Ports Are Incorporated Into Manifold - Eliminates Flow Restricting Pin. Of Fact. Drivers Side Manifold - Compatible w/Factory Up-Pipes Which Allows For Easy Install - Machined Ports Match The Factory Gasket Openings - Improved Performance And Throttle Response - Durable Cast Ductile Iron Construction - Manifold Mounting Hardware Is Included - Outflows The Factory Manifold By 6% This Part Fits: Year Make Model Submodel 2001-2004 Chevrolet Silverado 2500 HD Base 2001-2004 Chevrolet Silverado 2500 HD LS 2001-2004 Chevrolet Silverado 2500 HD LT 2004 Chevrolet Silverado 2500 HD WT 2001-2004 Chevrolet Silverado 3500 Base 2001-2004 Chevrolet Silverado 3500 LS 2001-2004 Chevrolet Silverado 3500 LT 2004 Chevrolet Silverado 3500 WT 2002-2004 GMC Sierra 2500 HD Base 2001-2002 GMC Sierra 2500 HD SL 2001-2004 GMC Sierra 2500 HD SLE 2001-2004 GMC Sierra 2500 HD SLT 2003-2004 GMC Sierra 2500 HD WT 2002-2004 GMC Sierra 3500 Base 2001-2002 GMC Sierra 3500 SL 2001-2004 GMC Sierra 3500 SLE 2001-2004 GMC Sierra 3500 SLT 2004 GMC Sierra 3500 WT ## Details - **Price:** 1900.54 CAD - **Vendor:** aFe - **Type:** Headers & Manifolds ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 1900.54 CAD | In stock | ## Images - Photo - Primary - User 4 --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/afe-01-04-gm-v8-6-6l-lb7-twisted-steel-manifold-w-up-pipe) > Updated: 2026-07-15