HKS Fine Tune Timing BeltThis timing belts best suited for use with HKS Slide Cam Pulley. Optimized belt strength for each engine application makes the Fine Tune Timing Belt ideal for use with HKS Slide Cam Pulleys for high power high RPM engine. Features: Belt strength has been optimized for each engine application and designed to allow stable belt tension even when heat expansion occurs in the engine Previous timing belt manufacturing techniques have involved with applying