I am looking for a muffler for a 1975 Honda CB750F, either an original one or a Dunstall one. It's easily recognizeable because it has a 2-1/2 inch ID inlet. Dunstall made a special muffler for these bikes. This is for a rider, so it doesn't have to be perfect. Contact Simon, Click on my name for contact info or post a reply and I will contact you. Thanks!