Subaru WRX/STI Lightweight Pulley Kit by Go Fast Bits (MY99-00). A precise, bolt-on 3-piece set that reduces rotating mass for quicker revs and sharper throttle response.

Precision CNC-machined from a single billet of 6061-T6 aluminum, this kit replaces the factory crank, alternator, and power steering pulleys. By cutting rotating inertia by up to 85% and using tested underdrive ratios, it frees torque for acceleration and trims accessory load at high rpm, without hurting accessory performance or requiring tuning.

Features

• Suits Subaru WRX/STI MY99-00
• 3-piece underdrive set: crank, alternator, power steering
• 6061-T6 billet aluminum construction
• Up to 85% inertia reduction vs. stock
• Direct bolt-on; no tuning needed

Questions? Call our Austin shop at 512-982-9393 or our Los Angeles area location at 562-981-6800. We offer installation and customization at both locations in Austin, Texas and the Los Angeles, California area.

Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov