PERRIN 02-05 Subaru WRX / 04-06 STI / 93-11 Impreza Lightweight Alternator Pulley - Blue

This Perrin Lightweight Alternator Pulley is made from a solid piece of 6061-T6 aluminum, then hard anodized blue. Reducing the rotational mass of your alternator pulley can lead to a more responsive engine. By taking weight off the alternator pulley, the engine doesn't have to work as hard to spin it, which can free up a small amount of horsepower and improve throttle response, especially in the higher RPM range. This pulley is designed as a direct replacement for your factory alternator pulley, making installation straightforward.

The aluminum construction is not only lightweight but also durable, and the hard anodizing helps protect the surface from wear and corrosion. This part is a popular choice for Subaru owners looking for simple, effective engine modifications that offer a noticeable difference in how the engine feels. It's a well-built component that contributes to a smoother-running and more eager engine.