
Upgrade exhaust flow while maintaining emissions compliance with the MBRP 3-Inch Armor Lite Turbo Downpipe for 2015–2016 6.6L Duramax-powered GM HD trucks. Designed to replace the restrictive factory downpipe, this upgrade helps reduce exhaust backpressure and improve turbo efficiency and throttle response. Constructed from black-coated aluminized steel, it provides durability, corrosion resistance, and a clean under-truck appearance. Featuring CARB EO approval, this downpipe is 50-state legal and backed by MBRP’s 3-year warranty.
Only works with a 3 bolt flange style connection
Product Specifications
Brand: MBRP
Part Number: GMCA428
Product Type: Turbo Downpipe
Exhaust Series: Armor Lite
Pipe Diameter: 3"
Material: Black-Coated Aluminized Steel
Engine: 6.6L Duramax Diesel
Vehicle Type: Diesel
Emissions Compliance: CARB Legal
CARB EO Number: D-763-2
Universal: No (Vehicle-Specific Fit)
Warranty: 3-Year Manufacturer Warranty
Chevrolet Silverado 2500HD
2015
2016
Chevrolet Silverado 3500HD
2015
2016
GMC Sierra 2500HD
2015
2016
GMC Sierra 3500HD
2015
2016
Note: Fits 6.6L Duramax diesel models only.