I just got my parts I waiting for from ebay http://www.thumpertalk.com/forum/showthread.php?t=984539 The expansion pipe flange to the exhaust port is not round on the pipe. Everything seems to line up, but because the pipe end is oval it's too narrow top to bottom to fit over the exhaust. This pipe and silencer isn't nearly as clean as it looked in the pictures. there is a good bit of surface rust on the bottom of the pipe, and the silencer pipe. The inside is pretty rusty too. My question is: Is this pipe messed up, or do I need a different exhaust flange adapter for the FMF Fatty on this CR80? If this is messed up, what would be a good way to expand the pipe flange to make it round again? The material is pretty darn thick, not like the stock pipe.