Pump up the volume of your 2015 Ford Mustang GT exhaust The full 304 stainless steel, mandrel - bent construction provides optimal flow and excellent appearance. If you want the best in exhaust performance, pair this GT X or H - pipe with the Mishimoto 2015 Ford Mustang GT Axleback exhaust. The Mishimoto 2015 Ford Mustang GT X and H - Pipes fit both manual and automatic transmission vehicles, and just like all Mishimoto Mustang parts, comes with the Mishimoto Lifetime Warranty.