Welcome To Merchant Automotive—The Duramax Diesel Engine & Allison Transmission Performance Specialists You Can Count On!

MBRP Chev/GMC Duramax 6.6L3 Inch Turbo Down Pipe For 11-15 Silverado/Sierra 2500/3500 Duramax MBRP GM8427


Due to daily fluctuating stock levels, please call (616) 772-9551 for time sensitive orders.

Our Guarantees

Truck Expert a call away The fastest shipping lifetime customer support

Product Information

The MBRP GM8427 3" Turbo Downpipe provides a smoother flow from the turbo in your 2011-2015 GM 6.6L Duramax. Removing the restriction in the factory downpipe results in lower EGTs and increased performance.

Reviews & Questions