10-04-2025
MBRP Down pipe
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Improve exhaust flow and turbo efficiency on your 6.6L Duramax-powered HD truck with the MBRP 3-Inch Armor BLK Turbo Downpipe. Designed to replace the restrictive factory downpipe, this upgrade helps reduce exhaust backpressure and supports improved throttle response and overall diesel performance. Constructed from black-coated aluminized steel, it delivers excellent durability and corrosion resistance while maintaining a clean, aggressive appearance. This downpipe is vehicle-specific for select 2004.5–2010 GM HD applications and is backed by MBRP’s 3-year warranty
Product Specifications
Brand: MBRP
Part Number: GM8424
Product Type: Turbo Downpipe
Exhaust Series: Armor BLK
Pipe Diameter: 3"
Material: Black-Coated Aluminized Steel
Engine: 6.6L Duramax V8
Vehicle Type: Diesel
Vehicle Configuration:
6.6L Duramax Engine Only
2004.5 models only
Early 2004 models excluded
Emissions / Sales Restriction: Not for sale in California
Universal: No (Vehicle-Specific Fit)
Warranty: 3-Year Manufacturer Warranty
Chevrolet Silverado 2500HD
2004.5–2010
Chevrolet Silverado 3500HD
2004.5–2010
GMC Sierra 2500HD
2004.5–2010
GMC Sierra 3500HD
2004.5–2010
Note: Fits 6.6L Duramax models only.
Early 2004 models are not compatible.
