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2001-2004 (FED) GM 6.6L Duramax High-Flow 304 Stainless Steel Down Pipe

$300.00 In Stock Temporarily Out of Stock
45478383354099
PART NUMBER: 117000400 GTIN: 840171210279

Features

  • 304 Stainless steel construction for durability and corrosion resistance
  • Lower EGT, better turbo efficiency and response
  • TIG welded flanges for leak-free, robust connections
  • Smooth transitions and free-flowing design     
  • Woven titanium heat sleeve
  • Lower down pipe gasket
  • Compatible with factory or PPE Up-Pipes

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D-701-30

  • Description
  • Compatible Vehicles
  • Downloads

High-Flow 304 Stainless Steel Down Pipe

The factory downpipe is constructed from two pieces of formed sheet metal welded to an oval pipe. The factory design features a sharp, abrupt transition immediately after the turbine flange, which restricts exhaust flow and impedes performance.

Upgrade your LB7 with the PPE Free-Flow Downpipe and eliminate the rusted, restrictive factory design. Crafted from durable 304 stainless steel, this downpipe features a robust half-inch turbine flange, a CNC-machined lower flange, and smooth, optimized transitions for unobstructed exhaust flow. To further enhance performance, it comes with a woven titanium sleeve that effectively insulates heat, protecting the engine bay.

High-Flow 304 Stainless Steel Down Pipe - 01-04 (FED) GM 6.6L Duramax

2004 GMC Sierra 3500HD 6.6L V8 Turbo Diesel (Duramax)
2004 GMC Sierra 2500HD 6.6L V8 Turbo Diesel (Duramax)
2004 Chevrolet Silverado 3500HD 6.6L V8 Turbo Diesel (Duramax)
2004 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel (Duramax)
2003 GMC Sierra 3500HD 6.6L V8 Turbo Diesel (Duramax)
2003 GMC Sierra 2500HD 6.6L V8 Turbo Diesel (Duramax)
2003 Chevrolet Silverado 3500HD 6.6L V8 Turbo Diesel (Duramax)
2003 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel (Duramax)
2002 GMC Sierra 3500HD 6.6L V8 Turbo Diesel (Duramax)
2002 GMC Sierra 2500HD 6.6L V8 Turbo Diesel (Duramax)
2002 Chevrolet Silverado 3500HD 6.6L V8 Turbo Diesel (Duramax)
2002 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel (Duramax)
2001 GMC Sierra 3500HD 6.6L V8 Turbo Diesel (Duramax)
2001 GMC Sierra 2500HD 6.6L V8 Turbo Diesel (Duramax)
2001 Chevrolet Silverado 3500HD 6.6L V8 Turbo Diesel (Duramax)
2001 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel (Duramax)

Installation Guide: 

01-04 Duramax Three-Inch Down Pipe
Check vehicle fitment

(Change vehicle)

Customer Reviews

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T
Tony
Quality manufacturing

The cast and machined flanges are of quality I wouldn't want to hide under a clamp. They blend well with the pipe and would appear to have good flow characteristics. Everything fit right up as it should. I did end up needing to add a third hose clamp to the middle of the wrap to keep it from sliding down the pipe.

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