
Improve exhaust flow and turbo response on your early 6.6L Duramax-powered HD truck with the MBRP 3-Inch Armor Lite Turbo Downpipe. Designed to replace the restrictive factory downpipe, this upgrade helps reduce exhaust backpressure and supports improved diesel performance and throttle response. Constructed from black-coated aluminized steel, it offers excellent durability and corrosion resistance for daily driving and towing. This direct-fit downpipe is engineered for 2001–2004 GM HD applications and is backed by MBRP’s 3-year warranty.
Product Specifications
Brand: MBRP
Part Number: GMCA425
Product Type: Turbo Downpipe
Exhaust Series: Armor Lite
Pipe Diameter: 3"
Material: Black-Coated Aluminized Steel
Engine: 6.6L Duramax Diesel
Vehicle Type: Diesel
Universal: No (Vehicle-Specific Fit)
Warranty: 3-Year Manufacturer Warranty
Chevrolet Silverado 2500HD
2001
2002
2003
2004
Chevrolet Silverado 3500HD
2001
2002
2003
2004
GMC Sierra 2500HD
2001
2002
2003
2004
GMC Sierra 3500HD
2001
2002
2003
2004
Note: Fits 6.6L Duramax diesel models only.