Aftermarket Exhaust Systems are a popular addition to any 1999-2003 Ford 7.3L Powerstroke. When you start shopping for an exhaust you will notice multiple construction options and price ranges. Many manufacturers offer exhaust systems constructed in either aluminized steel or stainless steel. A performance exhaust will typically add horsepower/torque, lower the exhaust gas temperatures (EGT's), and can also help engine efficiency. Exhausts are commonly available in either 4" or 5" diameters. Exhaust installation is typically a DIY task that can completed right in your driveway. Find all the leading manufacturers such as MBRP, Magnaflow, AFE, Banks Power, AP Emission Technologies and more!