ATI Super Damper Harmonic Damper Part Number: ATI 918253 "Street" The patented ATI Super Damper is the only damper designed exclusively for high performance engines. ATI's Super Damper for Mitsubishi Evo X 4B11T MIVEC engines High horsepower street & race versions Dampens torsional crankshaft vibrations at all RPM levels Protects against engine harmonics Street Version: Direct replacement for the stock OEM damper Street Version: 5.67" Diameter 3% Overdriven belt drive Laser-etched timing marks SFI 18.
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