PYPES Super System Cat-Back Exhaust Systems ramp up the performance and crank up the sound for Mustangs. All stainless steel,pipes are mandrel bent for an extreme improvement in sound and performance over the stock exhaust. Each Super System comes with a Pype Bomb Muffler delete rear kit that features special resonated tips to give you the ultimate in aggressive sound without the popping associated with other muffler delete systems.