Well I was deff. wanting to do it to the factory pulley but I was just wondering if anyone has done this mod it any pulleys. I had the ps shaved too but I figured I wasn't using the ac either so why not shave that. I mean its just power being wasted by the motor. Also, why would you need it balanced if you use the stock pulley that has the harmonic balancer in it already? I mean if it is shaved smooth completely across the pulley then how would you be throwing it out of balance?