The 13 tooth will help a butt load from the 14, the 063 will give you better bottom than the 086, the 053 may give you too much bottom, and the engine will top out to early, just from my experience the all these pipes. I would bet with the 13 clutch bell, that will solve all your problems, no matter what clutch your using, the 2A and 2P is easier/for giving, on bottom, the 4 alum just hits harder.