PPE High-Flow Stainless Steel Down Pipe (2002-2004 GM 6.6L Duramax LB7) - (117000424
Overview
Replace the restrictive factory downpipe on your LB7 with the PPE High-Flow 304 Stainless Steel Down Pipe. Designed to improve exhaust flow and turbo efficiency, this upgraded pipe eliminates the sharp, restrictive transition found in the OEM design.
Improved Flow and Turbo Response
The stock downpipe is made from two formed sheet-metal halves welded to an oval tube, creating an abrupt bottleneck immediately after the turbine flange. PPE's redesigned version features smooth, optimized transitions that allow exhaust gases to move freely, helping lower EGTs and improving turbo response.
Durable 304 Stainless Steel Construction
Built from premium 304 stainless steel, this downpipe offers excellent corrosion resistance and long-term durability. It includes a robust 1/2-inch turbine flange, a CNC-machined lower flange, and TIG-welded connections for a leak-free, high-strength assembly.
Heat-Insulating Titanium Sleeve
To help manage under-hood temperatures, PPE includes a woven titanium heat sleeve that provides effective thermal insulation and protects surrounding components.
Key Features
- 304 stainless steel construction for strength and corrosion resistance
- Smoother, free-flowing design reduces restriction
- Helps lower EGTs and improves turbo efficiency
- TIG-welded flanges for a strong, leak-free seal
- Includes woven titanium heat sleeve
- Comes with lower downpipe gasket
- Compatible with factory or PPE up-pipes
Application
- 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)
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
