This PowerPro HP 2-into-1 is a classic system at the top of its class. Being that you could expect unmatched performance gains that combine the perfect tone of a deep and throaty rumble as you would expect from your H-D motorcycle. However, the system looks as good as it sounds as it features full length heat shields for the head pipes and their unique collector area. PowrPro 2-into-1 exhaust system increases power and torque The 4" muffler body produces a deep rumble, and it is capped off with race pro tips (RPT) This updated 2-into-1 exhaust system is at the top of the class Real world performance gains matched by the deep throaty rumble you expect Looks as good as it sounds with its full coverage heat shields that will give your bike an aggressive appearance The 4" muffler body is capped off with a machined billet tip, raw or power-coated black Internally, the muffler uses the same sound-control technology as Cobra's bagger Slip-On mufflers, providing one of the deepest tones available Cobra constructed the muffler body in such a way that it will not discolor Guaranteed not to turn blue for the life of the product