i dunno why he said steeda only....ive got the billet bbk ones and they work perfectly...the only diff is that they piggyback the stock crank pulley....
but youve got an 03GT, so youll have no charging problems at all...ive got two subs hooked up with my u/d pullies and i dont even get dimming lights...
one thing you might experience ontop of the 5 extra horses is increased gas mileage...i did...dunno how, but i did
