VAC Motorsports Underdrive Pulley Individual Components, BMW S14

The VAC S14 Underdrive Power Pulley Set is now lighter than ever. Using only virgin aluminum, a hard anodized finish, and the tightest tolerances, our pullies are used on the fastest S14s on the planet.
There lightweight design optimize performance and response while under-driving components for proper function (reducing pump cavitation) at race RPMs.

A must for track cars, they can also be used on a max performance oriented street car. (For a street vehicle with a lot of in car entertainment, we do not encourage under-driving the alternator.) Chose and individual pulley above from the drop down menu
Our pulleys are precision made from 6061 T6 Billet Aluminum and are hard anodized for durability (satin black only).

*Please note, the tolerances on all our components are manufactured down to the thousandths of an inch. These pulleys may come very close to contact with some other components, this is normal. *

*Please retain Large OEM washer to be used on back side of Alternator Pulley, necessary for proper belt alignment* Click here to find out what makes our VAC machined products the best.