It makes noise. :-) more noise == going faster. its suposed to give better linear flow, but hey i dunno what ther real deal is. brian 82 Rabbit -- Topless Bunny -- lipstick Red getting another heart transplant. On Tue, 12 Feb 2002, Ryan Ruggles wrote: > Does drilling out the bottom of the air box really do anything performance wise or is that bs? > > Ryan >