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The GFB lightweight pulley kit for 1999–2000 Subaru WRX/Forester GT is a three‑piece underdrive set that replaces selected accessory pulleys to reduce rotating mass. CNC machined from billet 6061‑T6 and designed to cut inertia, the kit sharpens throttle response and makes the engine feel more willing to rev without harming accessory function; it is presented as a bolt‑on solution to improve drivability.
GFB 99-00 Subaru WRX/Forrester GT Light-Weight Engine Pulley Kit
