Pulleys

do they do anything. im getting a prelude si 1992. and i wanna know, how much are they and if it does give performance gains, how much.

I have them on my Si. Maybe a little quicker throttle response and 1 or 2 HP. Not much, but when you finish all the other bolt ons, i'd get them. I haven't had any problems with them like a lot of people say, just don't replace the crank pulley. Go with CAI, cat-back exhaust/full exhaust first.