Thanks for the suggestions guys. ESR mufflers are made to bolt directly to the frame. They only use one OEM rubber mount under the expansion chamber. The muffler fit pefectly on the stock frame. On the intake, we are using cr reeds, cr boot, and a mikuni carb with a special airbox adapter ring. Again, fit perfectly on the stock frame. I'm going to make some phone calls and try some different things. Is Arens still in business??? Rook, what are you using on your intake, airbox, etc? Ours seems like the subframe is too short. The airbox is squeezed in and the seat is beeotch to get on. You have to jam it really far forward to get it in.