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The GFB lightweight 3-piece pulley kit for 2013 Subaru BRZ and 2013 Scion FR-S replaces crank, alternator and water pump pulleys with machined 6061-T6 aluminum units to reduce rotating mass and sharpen throttle response. These pulleys aim to free up torque previously used to accelerate heavier factory pulleys. Made from a single billet and CNC machined, the kit can reduce rotating inertia significantly (up to 85% noted by the manufacturer), producing crisper throttle response and potentially faster acceleration without harming accessory performance.
GFB 13 Subaru BRZ / 13 Scion FR-S 3 Pc L/W Pulley Kit (Inc Crank/Alternator/Water Pump Pulleys)
