Replace or upgrade the downpipe in the exhaust system of your 2007.5-2010 Chevy/GMC 6.6L LMM Duramax. The stock downpipe often features bends or crimps in the tubing that restricts the flow of exhaust. Upgrading to an aftermarket downpipe with larger diameter tubing and smooth mandrel bends can offer increases in horsepower and torque and help lower exhaust gas temperatures (EGT's). Shop all the leading manufacturers including AFE, AP Emissions Technologies, Banks Power, BD-Power, Dorman, Fleece, PPE, Magnaflow, MBRP, and more!
