GFB Evo 4-9 Under-Drive Crank Pulley w/ Belt

The GFB Evo 4-9 Under-Drive Crank Pulley with Belt from Go Fast Bits is a performance upgrade designed to reduce engine rotating mass and improve throttle response. Crafted from a single billet of 6061-T6 aluminum and precision CNC machined, this lightweight pulley kit offers a significant performance advantage by enabling faster acceleration and sharper throttle feel without requiring additional supporting modifications or tuning. Its durable construction ensures long-lasting performance while maintaining precise tolerances for optimal operation.

This pulley kit is compatible with Subaru models from 2004 to 2009, making it suitable for various engine configurations within this range. It serves as a direct bolt-on upgrade that enhances engine responsiveness for street and track use. The kit includes the under-drive pulley and belt, providing a straightforward installation for enthusiasts seeking improved performance without complex tuning. Designed for daily driving, spirited street use, or track days, this upgrade delivers noticeable improvements in engine dynamics.