Stainless Works Products Premium Exhaust Systems Categories Stainless Works Stainless Works Legend Series Catback Exhaust w Factory Connect & Dual DJP Performance Performance Parts Stainless Works ST Catback Ford, 2011 2016, 6.2L, Stainless MPI Exhaust Cat Back Dual Stainle How to Install Stainless Works 3 in. True Dual Cat Back Factory. Upgrade the sound on your 2011 2016 F 250 F 350 with the aggressive sound of the Stainless Works catback exhaust system. This 304 stainless steel system is a 3 true dual catback featuring an x pipe and a single straight through muffler. Connect to the Stainless Works fully tig welded header system or your stock manifolds with a simple bolt on installation. Upgrade your exhaust today with Stainless Works. Features: Mandrel bent TIG welded headers 1 7 8 primaries Port matched flanges 3" slip fit connectors Simple bolt on installation X Pipe and a single straight through muffler Application: 2011 2016 Ford F 250 F 350 6. 2L Not for sale or street use in CA & CARB states.