Originally Posted by planemanx15
I'm a little confused with the exhaust dimensions. The end of the header where the stock muffler attaches is 1.135 ID and 1.265 OD? Im looking to build my own cheapo midpipe, and the pipe coming off the Hayabusa muffler is huge, i think over 2".
Hayabusa muffler is cheap till you buy the 220.00 mid pipe,the FMF is actually built for the bike.
FMF just seems like less hassle as long as a person can repack it at some point. Im not too sure about having a GSXR muffler sticking way the heck out the back of the bike,what happens if the bike falls down?
I just run the stock muffler and dont worry about it.