Stainless Works Ecoboost Catback Chambered Muffler Factory Connect2015 20 Ford F 150 2. 7L and 3. 5L Ecoboost for up to 156. 5" Wheelbase. All tubes are CNC mandrel bent for optimal flow. Made from 304 stainless steel for maximum corrosion resistance. 3 1 2 catback with Chambered Turbo Muffler and polished tip. Fits to flanged Factory Connection point. These are TIG welded for strength and durability. These kits come with a lifetime warranty and proudly made in the USA.