Fluidampr Internally Balanced Crank Damper Pulley
Fits 2002-2005 Subaru Impreza WRX 2.0L Turbo (EJ205 Engine)
Fits 2006-2014 Subaru Impreza WRX 2.5L Turbo (EJ255 Engine) 
Fits 2004-2021 Subaru Impreza WRX STI 2.5L Turbo (EJ257 Engine) 

Fluidampr Sport Compact Engine performance upgrades help with the naturally occurring characteristics of harmful crankshaft torsional vibrations. By installing a Fluidampr viscous damper you will reduce wear on the main bearings and timing gear, achieve more accurate valvetrain operation and lower the risk of crank failure. Unlike rubber based dampers, Fluidampr automatically adapts to your modifications, then continuously self-tunes in real time to optimum damping at both peak levels and across a broad changing frequency range. As the engine revs up, torsional vibration suspends the inertia ring and reduces its weight felt on the crankshaft. Measured as rotating weight, this effect helps maintain quick revs while preserving optimum dampening. Must have for instant protection against turbo and NOS power surges. Features precision machined and computer balanced components. Never needs to be tuned or rebuilt. SFI Approved. Made 100% in the U.S.A. ISO Certified. Images are for display purposes and may not be application specific.

 

Bore Diameter: 0.9436"

Degree Marking Range: TDC

Degree Markings: Engraved

Engine Balance: Internal

Finish: Black Zinc

Keyway: Single

Length: 1.927"

Material: Steel

Mounting Hardware Included: No

Outside Diameter: 5-3/8"

Safety Rating: SFI 18.1

Weight / Rotating Weight: 6.9 lbs / 4.6 lbs