J Robinson

BT-6A will fit but you will need to build some extensions for the brackets. I used a couple of drilled angle iron to extend the brackets and works perfect.

Does anyone have experience installing a Silent Rider exhaust on their Massimo Buck 450? The BT-6A looks to be the right config but seeing if anyone else has done this. There is also a universal BT-99 but would prefer direct a bolt on fit to the stock muffler.