Hello all, Im in the middle of buying a pontiac grandprix gtp from my friend(making payments on it). I've been to zzperformance website and looked at all the stuff they have for sale. Anyone got any performance tips, like what size supercharger pulley I should run. also what do i have to do to run a smaller pulley? Also so far the only thing I've done to the car is carbon fiber wrapped the trim around gauges because the trim was painted white.