i dont plan on going below 3.2"... and im on a very tight income and intercoolers seem to be a pretty penny. i dont intend to make a race car, just wanna be able to go to track and run mid 13's. i mean if i can get that with the 3.4" pulley, i'll just stick with it. and do you know the name of the stuff from napa bio? i have a napa in the closest town to me.