One of the most vital modifications you can do to your B58/S58. Once you start modifying these engines, they are known for the crank pulley to fail. The crank pulleys are pressed 2 piece designs from factory, so with the higher torque the press in design isn't ideal.

Aftermarket options aren't ideal either. We have experimented with all kinds of pulleys and our modified OEM pulleys had the best results. 

We require core so you will need to ship your crank pulley in first. we may have some on hand so don't hesitate to reach out to us first