AFAIK the muffler and midpipe are one piece. Full exhaust is only option without cutting the muffler off and finding a slip on that fits the pipe. Prob more trouble than it's worth. Break the engine in before making any exhaust changes. A tune would be pretty important too (ECU flash or piggyback system like power commander). I paid about $500 for my full system from Two Bros. It sounds pretty good but with a parallel twin you can only expect so much.