PowerBond™ by DAYCO® Supercharger Performance Balancers are designed with a unique combination of material and castings providing the maximum strength and durability of bonded dampening rubber. Note: This balancer have been modified to 8-ribs that will NOT match the original OE balancer. This modified balancer changes the geometry of the original belt drive. Dayco® recommends this balancer to be serviced by a professional installer.