hey i need to know what belt to use after i install the pulley i bought it off ebay and i emailed the guy about it and hasent emailed me back yet an that was two days ago so if anyone can help me thanks

when i installed my UR crank pulley and AEM alternator pulley I used my factory belt, i believe if you only do one of the pulleys you need to change the sizes

Right, smaller and lighter crank pulley almost sure you need a smaller belt unless the difference in size of pulleys is not much so it will depend on the size of the crank pulley you got. I installed a UR crank pulley and had to go to a 46 inches belt (Dayco 5050460) if that helps.By the way the lighter and smaller pulley really makes a difference in how fast the engine revs up.