PERRIN 19-21 Subaru WRX / 16-18 Forester / 15-19 Legacy Lightweight Crank Pulley - Blue

This Perrin crank pulley is made from a solid piece of 6061-T6 aluminum, then anodized blue for a clean look. It's designed to replace the heavier factory crank pulley, which can help your engine rev a bit more freely. By reducing the rotational mass at the crankshaft, you'll notice a slight improvement in how quickly the engine responds to throttle input. This pulley is a direct replacement, meaning it bolts right up to your existing accessory belt and hardware.

The factory crank pulley is often quite substantial, and while it serves its purpose, it adds weight that the engine has to spin. Perrin's design shaves off a significant amount of that weight, aiming for a more nimble feel from the engine. The anodized blue finish is a nice touch for those who like to dress up their engine bay, and it holds up well against heat and exposure.