I had a damn quad run into me and smash my stock pipe along with my foot. I've been looking on ebay for a used FMF or stock replacement pipe, but haven't found much. What is the difference between 02-04 and 05-07 exhausts? Is it just the flange, or more than that? They have different part numbers, so I assume they aren't interchangeable. My foot is starting to heal, so if anyone has a pipe for an 06 CR250 they want to get rid of, let me know.