IMPORTANT NOTE:
This pulley will only fit models with the OEM hub: 12339AA010. 2018-2021 WRX models do not have this hub so it will need to be purchased in order to install this part. 2015-2017 WRX models will not require this additional part.
Click HERE to purchase the OEM hub 12339AA010.
The Fluidampr viscous damper will reduce wear on your engines main bearings and timing gear. Therefore achieving more accurate valvetrain operation and lower the risk of crank failure.
Completely unlike the rubber based dampers, this will automatically adapt to your modifications. It will then continuously self-tune in real time, 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.
Benefits:
- Decreased engine vibration. No more flywheels, crank trigger wheels, or timing gears falling off of the crankshaft. This is unavoidable when revving past 8000rpm without an engine damper.
- Decreased "Clutch/Gear Box Chatter" which is caused by lightweight single mass flywheels.
- Reduction in rpm drops when shifting in a competitive environment.
- Gains of 3-10whp and 5-13ft/lbs. torque depending on your current setup.
- An overall more efficient and reliable engine.
Features:
- Black Zinc Finish
- Reduces Harmful Engine Vibrations
- Never Needs To Be Rebuilt Or Tuned
Specifications:
- Bore Diameter 0.787"
- Degree Marking Range 1 timing mark
- Degree Markings Engraved
- Engine Balance Internal
- Finish Black Zinc
- Keyway Not Applicable
- Length 1.620"
- Material Steel
- Mounting Hardware Included No
- Outside Diameter 5-7/8"
- Safety Rating SFI 18.1
- Weight / Rotating Weight 5.8 lbs / 3.8 lbs
Note:
- Will NOT fit EJ-Series engines.