bub 7 kit was missing these,took a measurement and looked like 2 inch(harley dealer had nothin like that) found very little with the search except that its actually a 2&1/8 inch.
Im going to do that tomorrow,heard the muffler clamp from bub were so so? also might try and independant aswell. Auto parts stores is a good idea,did that and they only had these huge freaky lookin ones for cars.