Kartboy Lightweight Aluminum Crank Pulley WRX 15-21 / BRZ 13-20 / FR-S 13-16 / 86 17-20 | KB-050-FA/FB Headlights 10% average weight reduction for

10% average weight reduction for better valvetrain dynamics

aged plastic OEM caps with durable

Our Short Hubs are made to work with our NRG quick release

Shown here is the 04-05 STI Splitter

Kartboy Lightweight Aluminum Crank Pulley WRX 15-21 / BRZ 13-20 / FR-S 13-16 / 86 17-20 | KB-050-FA/FB Headlights 10% average weight reduction forProduct Fitment: 2015 2021 Subaru WRX 2013 2020 Subaru BRZ 2013 2020 Scion FR S 2017 2020 Toyota 86 Unlock smoother acceleration, sharper throttle response, and better engine feel with the Kartboy Aluminum Crank Pulley for Subarus FA and FB engine families. Crafted from high strength billet aluminum and engineered to replace the heavier factory unit, this pulley is a key upgrade for drivers looking to refine their boxer engines performance.