PERRIN 15-25 Subaru WRX / 15-22 Crosstrek / 14-18 FXT Lightweight Alternator Pulley - Red

If you're looking to get a little more pep out of your Subaru's engine, swapping out the stock alternator pulley for a lighter one can make a noticeable difference. This Perrin Performance alternator pulley is made from well-built aluminum and is anodized red for a clean look under the hood. By reducing the rotational weight on the alternator, your engine doesn't have to work as hard to spin it up, which can lead to slightly improved throttle response and a more eager feel when you get on the gas.

The pulley itself is a direct replacement for the factory unit, meaning it fits right without needing any modifications. Perrin is known for making solid parts for Subarus, and this pulley is no exception. It's a straightforward way to shave a bit of weight and add a touch of color to your engine bay. While it's not going to drastically change your car's performance, it's a popular modification for those who like to fine-tune their engine's responsiveness.