
Increase 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 diesel performance. Constructed from black-coated aluminized steel, it provides durability, corrosion resistance, and a clean under-vehicle appearance. This direct-fit downpipe is engineered for 2011–2015 GM HD applications and is backed by MBRP’s 1-year warranty.
Product Specifications
Brand: MBRP
Part Number: GM8427
Product Type: Turbo Downpipe
Exhaust Series: Armor BLK
Pipe Diameter: 3"
Material: Black-Coated Aluminized Steel
Engine: 6.6L Duramax Diesel
Vehicle Type: Diesel
Universal: No (Vehicle-Specific Fit)
Warranty: 1-Year Manufacturer Warranty
Chevrolet Silverado 2500HD
2011
2012
2013
2014
2015
Chevrolet Silverado 3500HD
2011
2012
2013
2014
2015
GMC Sierra 2500HD
2011
2012
2013
2014
2015
GMC Sierra 3500HD
2011
2012
2013
2014
2015
Note: Fits 6.6L Duramax diesel models only.