ATI Super Damper 917991 Harmonic Balancer Subaru Impreza WRX

Subaru Impreza WRX Super Dampers

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 for competition use

Specs

Shell Material: Aluminum, Part #916883 5% Overdriven

Hub Material: Steel, Part #916884

Inertia Weight: 2.2 LBS, 3-Ring