The GFB 2001 Underdrive Pulley Kit is a high-performance upgrade designed for Subaru WRX/STi MY94-07, Forester MY98-07, and Legacy MY03-07 models. This 2-piece kit includes both the crank and alternator pulleys, along with the necessary belts for installation.

Made from lightweight 6000 series aluminum billet, this kit provides a significant weight saving over the factory pulleys, resulting in improved throttle response and reduced parasitic losses, especially at higher RPMs. The underdrive design (20% reduction) optimizes engine performance by reducing the load on the engine, allowing for a quicker revving engine without compromising low RPM operation.

Installation is straightforward, with no specialized tools required, and the kit comes complete with all necessary components to get your vehicle performing better in as little as 30 minutes. Enhance the overall driving experience of your Subaru or Legacy with the GFB 2001 Underdrive Pulley Kit.