The ATI Super Damper is engineered exclusively for high performance engines, providing superior control over torsional crankshaft vibrations. Factory crank pulleys deteriorate over time, especially under the increased stress of high RPM racing, which can lead to catastrophic engine failure. Many sanctioned race classes require an SFI Approved damper, and the ATI Super Damper exceeds SFI 18.1 specifications. Features include laser-engraved 360° timing marks and a durable black zinc chromate finish.