I'm sure you guys have gone over this but which aftermarket single pipe and can works on the xp 800r. I've got an 09 hillclimb coming and i'm not sure what to do. Right from the get go i'm planning a rk-tech head and reprogram(awesome on my last sled), pipe, can, some clutching and maybe some reeds. also what are you guys doing for clutching? any help would save me lots of $$$$ cause trial and error can be a real BI%#H. Thanks fellas