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no cutting or modification is required
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or 12AN LONG O-ring ports
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ATI Super Damper Crank Pulley for EJ WRX/STi (917991) ATI Dampers no cutting or modification isThe ATI Super Damper crankshaft pulley for EJ WRX and STi is suitable for high power street and race use. Direct replacement for the stock OEM damper. The damper's outer diameter is 5. 5" making it a 5% overdriven pulley. Unlike undampened underdrive pulleys, which offer no protection to high performance engines, the ATI Super Damper provides balanced dampening of torsional crankshaft vibrations at all RPM levels. The ATI Super Damper comes with laser
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