This cat-back exhaust system with integral X-pipe bolts directly to the stock factory catalytic converters, making your Mustang 100% emission compliant while providing an aggressive muscle car sound. The tuned stainless steel mufflers with 4" chrome-plated stainless steel tips not only sound great but look great too. Fits 2015-2016 Mustang GT 5.0L Bolts to stock catalytic converters 30 lbs lighter than the factory cat-back system Integral X-pipe 2.5" stainless steel mandrel bent cat-back tubing 4" chrome-plated stainless steel tip Loud aggressive sound is 49-state drive-by noise legal Uses stock hangers and mounts E.T.A. February 23, 2016