ATI Super Damper SFI 18.1 Harmonic Balancer - 6.325 in OD - Black Oxide - 28 oz External Balance - Small Block Ford 918911 H760C30XXL Pit Stop USA offers Rugged

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ATI Super Damper SFI 18.1 Harmonic Balancer - 6.325 in OD - Black Oxide - 28 oz External Balance - Small Block Ford 918911 H760C30XXL Pit Stop USA offers RuggedThe patented ATI Super Damper is the only damper designed exclusively for high performance engines. Eliminates torsional crankshaft vibrations Exceeds SFI 18. 1 specs Laser engraved 360 timing marks Black zinc chromate finished Inner and outer shells are available in aluminum or steel contain the steel inertia weight. The inertia weight has six (2 ring design) or eight (3 ring design) computer machined grooves to retain the proper durometer O rings