One of the easiest modifications for your Ford Mustang or Cobra is a catback exhaust system. Mustang and Cobra cat back kits include mufflers and tailpipes that attach to your Mustangs mid-pipe and fit 5.0 and 4.6 or 3.8 and 4.0 V6 Mustangs. Brands like Ford Racing, Pypes, Magnaflow, Flowmaster, Bassani, JBA and Mac Performance, with some manufactured from stainless steel. Some manufacturers offer Mustang side exhaust kits like from Cervini's. Get a louder exhaust for your Mustang as well as increase power!