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The ATI 7.074-inch steel crankshaft damper for Chevy big-block engines adds a second 1/4-inch keyway for accessory drive options. This one-piece, three-ring damper provides rotational damping and timing consistency for big-block installations where an additional key location is needed for blower or accessory drives.
ATI Damper - 7.074in - Steel - Chevy BB - w/2nd 1/4 Key - 3 Ring - 1 Pc
