I have a 2003 Honda CBR F4I and I have a Yoshimura tri-oval exhaust on it and love the sound to death. I have not found any pipe out there that sounds like these for sleds. I was thinking, if a bike runs up to 16,000RPM fine, a bike exhaust keeps sound, can handle heat, and is high flow enough to move pressure fast. Since a sled runs higher RPM, and not much problem with heat, why could you not put a bike exhaust on a sled? One person said I'd be buying new rings and cylinders before long and I want to know why. This aftermarket exhausts on sled don't sound a hell of a lot of different from a bike exhaust. Same RPM range, pipe size, ....am i missing something?