I love the exhaust it took a bit for the bike to get used to it prob a few minutes, but i paired the pipe with the k&n air filter and the power is definately noticeable. The sound well i got the swamp xl exhaust and it gave me chills i couldn't get the smile off my face, its almost obnoxious i love it wouldn't get any other pipe. its amazing sound and def power increase. I talked to a guy the other day and im ordering a Powercommander fuel optimizer to get the full potential out of my pipe. The guy i talked to said that being the computer thinks you still have stock exhaust and filter you really need the programer to get the full power gains and best quality out of the pipe. I didn't order my pipe from HMF i actually got it on ebay. needless to say either way you go you should get the pipe. but i highly recomend getting a K&N filter and the powercommander programer. do your homework and see whats a fit for you. but if you get the pipe you wont regret it i can promise you that!!!