i purchased the lexx mx slip on removed my air box lid, and installed a hmf fuel optimizer and this thing is bad to the bone. i also put maxxis razrs on the rear to help hookup. the lexx has a nice sound, and it is not extremely loud. also i payed $168.00+ 13 shipping. and it is a new part. i did not want to break the bank. after all i just wanted to open it up a little more, but still want it to be reliable.Whats a smokin deal?