The MBRP FS9401 4 Inch Downpipe is a high-quality aftermarket upgrade for your 7.3 Powerstroke. This downpipe is made from 4" T409 stainless steel, which is significantly stronger and more durable than the factory downpipe. It's mandrel-bent and jig-manufactured for an precise fitment, and it will help increase power and efficiency while lowering exhaust gas temperatures. Plus, the T409 stainless steel construction comes with a lifetime warranty so you can rest assured it will last the long haul. Whether you're looking to add some extra power or just want peace of mind knowing you have a top-notch product installed, the MBRP FS9401 4 Inch Downpipe is for you!