Replace or upgrade the exhaust system on your 2008-2010 Ford 6.4L Powerstroke with a new downpipe. 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). You can find all the top brands including AFE, AP Emissions Technologies, Banks Power, BD-Power, Dorman, Fleece, PPE, Magnaflow, MBRP, and more!