Provides great power with exceptional sound that is adjustable and not obnoxiously loud. Muffler allows for the use of a quiet cap to adjust the sound levels. With a quiet cap, this muffler still sounds mean, but does not have that loud tone. Uncapped the exhaust has a growl that is not over the top, but will surely let people know you mean business. Ceramic coating holds a great amount of heat into the pipe and is meant to withstand the high temperatures of exhaust components. Gain horsepower with even better low to mid range grunt. For better results a performance header is recommended. Optional quiet cap available separately.