Well i was having problems and someone told me to up my return pressure line size fromt he 5 inches i had it to like 11.... well its being a lil doggy on the bottem end but it screams top end(retune low end)... but i ran into a problem... heh at top speed it sheired my clutch bell and im looking for a replacement.... any ideas who to get one from? like stronger than ofna... how many teeth...? 13,14,15,16? Im looking for bottom end pwr, not so much top end but i dont know if a 13 will fit with a stock diff or if 13 was ment for a diffrent car.