Engineered to accept a wider 8-rib belt, the Victory Series HD Pulley System is built to handle high horsepower and extended high rpm use. Additional brackets, a heavy duty diesel-spec tensioner and a separate idler work in concert to ensure maximum drive grip throughout the rev range and no flex. Concept One supplies the highest quality aftermarket and OEM components available from companies like Powermaster, Edelbrock, Lares and more. Choose one of four finishes.