ATI Super Damper Crank Pulley for EJ205 EJ257 Fits Subaru WRX Sti

Description

ATI Performance Products, Inc. is proud to introduce its renowned Super Damper for Subaru EJ20, EJ22 and EJ25 engines -- Part # 917991.

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-etched timing marks and is a direct replacement for the OEM unit. The ATI Super Damper is a critical component for all high performance cars to help protect against engine harmonics and features a dual four-groove serpentine belt drive on the outer shell to utilize the factory serpentine belt set-up. All ATI Super Dampers exceed SFI 18.1 Safety Certification and are approved for competition use.

The patented ATI Super Damper is the only damper designed exclusively for high performance engines:
- Eliminates torsional crankshaft vibrations
- Exceeds SFI 18.1 specs
- Laser engraved timing marks
- Black zinc chromate finish

Damper Components: Hub, Outer Shell, Inertia Ring and Bolt Kit.

Part #917991

Notes: Minor trimming of the timing cover might be required for fitment.