Replace or upgrade the downpipe in the exhaust system of your 2003-2007 Ford 6.0L Powerstroke. 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). The stock downpipe often features bends or crimps in the tubing that restricts the flow of exhaust. You can find all the top brands including AFE, AP Emissions Technologies, Banks Power, BD-Power, Dorman, Fleece, PPE, Magnaflow, MBRP, and more!