It might be hard to imagine how reducing the mass of a pulley makes a car go faster, but accelerating a heavy factory pulley from say 3000-7000 RPM in a second or two saps a measurable amount of torque. GFB Lightweight Pulleys reduce inertia by up to 85 percent, so most of the torque that used to accelerate the pulley can now be applied to the wheels.
3-piece underdrive pulley kit (crank/alternator/pwr steering pulleys and belts). Suits WRX/STi MY99-00, Forester GT MY01-02).
Subaru Suits WRX/STi MY99-00, Forester GT MY01-02)
Product Features:
Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Epa: N/A
Carb Acknowledgement Required: f
Fits According to Mfg but not guarunteed.
1998SubaruImprezaRS
1999SubaruImprezaL
1999SubaruImprezaOutback
1999SubaruImprezaRS
2000SubaruImprezaL
2000SubaruImprezaOutback
2000SubaruImprezaRS
2001SubaruImprezaL
2001SubaruImprezaOutback
2001SubaruImprezaRS
2002SubaruImprezaOutback
2002SubaruImprezaRS
2002SubaruImprezaTS