take off your blower, and posish the inlet port of it, polish the plenum, clean the heat exchanger....and polish the bowl or tub (which ever name you want to use)....I lost 3/4 lb of boost but made 36 rwhp--- more efficiency....killer mod.....but your hands will be sore after the long weekend....no I did not port, jsut massaged everything....anyone else have good luck on this mod? :beer: