is there any difference in the different brands of u/d pulleys??? cuz the mac ones are half as much as steeda and i dont see how there could be that much different b/t them. btw does frpp make pullies for my model stang?? (99 gt) cuz they look great.
steeda is the best. steeda has a replacement crank pulley unlike the other's which piggyback onto your stock one. this results in the belt alignment being off causing it to slip off after some time which can be bad when you're driving n the middle of nowhere at night! get the steeda
either steeda or march as they are the only ones (to my knowledge) that offer a built in dampner.....steeda are best in my opinion....tried and tested you can't beat that
cuz the mac ones are half as much as steeda and i dont see how there could be that much different b/t them. btw does frpp make pullies for my model stang?? (99 gt) cuz they look great. 
