Some of ya'll are waaaaaaay too good so not telling ya what it is other than there are left and rights but this one's mount is spinning all the way around and has been 20 years since I had one so I don't know either. Sunday evening triva ; )
John, it's too easy to ID ! It's an early 1970 GS 455 right side muffler bearing 1st type Gr.3.867 #7984330. Give me a tough one will 'ya?
I'll try and find something tougher for ya the week, been doing an archaeological dig in the barn recently but you are probably too good