GrimmSpeed 095023 Black Lightweight Crank Pulley for 2015+ Subaru WRX BRZ Legacy Impreza / Scion FR-S 75% Reduction in Rotating Mass - weighs 1.1lb vs the 4.4lb OEM pulley Machined 6061 T6 Aluminum - high quality, precision construction Hard Anodized Finish - ensures a durable finish and resists corrosion Removal Tool Mounting - allows the use of the GrimmSpeed Crank Pulley Tool Factory Fitment - direct replacement for easy installation