4.125" 8-Rib Pulley / Black Every Whipple Supercharger pulley is made of 6061-T6 billet aluminum and anodized for wear and environmental protection....
4.250" 8-Rib Pulley / Black Every Whipple Supercharger pulley is made of 6061-T6 billet aluminum and anodized for wear and environmental protection....