ATI - Super Damper - Subaru - EJ20/22/25Specifications: Manufacturer: ATI Reference Number: 917991 Diameter: 5. 5" Weight: 6. 0 LBS ATI's Super Damper for Subaru WRX EJ20, EJ22 and EJ25 engines Dampens torsional crankshaft vibrations at all RPM levels Protects against engine harmonics Direct replacement for the OEM unit Four rib and five rib serpentine belt drives 5% Overdriven Utilizes factory serpentine belt set up Laser etched timing marks SFI 18. 1 Safety Certification and are approved
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