DAMPR STL BBC EXT BAL 7.074

The patented ATI Super Damper is designed exclusively for high-performance Chevy engines, specifically the 1970-1974 Corvette 454 engine. It eliminates torsional crankshaft vibrations, exceeds SFI 18.1 specs, has a black zinc chromate finish, is tunable, rebuildable, and efficient at all RPMs. It features laser-engraved 360 timing marks. The inner and outer shells are available in aluminum or steel, containing a steel inertia weight with computer-machined grooves to retain proper durometer O-rings. It's a direct fit replacement for the stock OEM unit and is capable of handling a wider variety of driving habits. Designed for engines that are externally balanced.