u say that the pro is liter and the cat has a tiny gas tank and u miss pro but then you have no regretts sounds like you just cant ride rite w/o a turbo
no way that the m8 beets a pro i just got a silber kit on my 13 pro and it floats over anthing if you want a heaver sled to dig out then get a m8 otherwise do up the pro ya it might not take the kit as good but u r goin to rebuild either one so go for the pro u wontt regret it