Well I bought it from the exhaust shop and the installed it. When I got my duals done I told them I wanted to keep that muffler. It sounds good, just make sure they remove the silencer after the muffler also to get the nice throaty burble sound. Nothing too loud but when you hit it you know it's there. If you still have all 4 catylatic converters then there is no need to worry about rasp or too much noise. I eliminated one and it sounded even better. You can install it yourself I guess if you want to do some cutting and clamping but I opted to just let them do all the work.