I've got an 02 Foreman and i wanna put a pipe on it, are they basically generic, like can i get any performance muffler and fab it up to fit my atv? Or do i need to buy a specific pipe that says "made for honda foreman". I'd rejet after anyway.

 

I suppose you could just rig up any silencer and make it work, but why? Just buy one made for your quad, and it will fit perfectly, it won't leak, and you won't have to deal with finding exhaust adapters that fit it and fabricating mounts.