PERRIN 15-18 Subaru WRX / 13-20 BRZ / 14-18 FXT / 13-16 Crosstrek Lightened Crank Pulley - Red

This Perrin Performance crank pulley is made from a single piece of billet aluminum, then anodized red. It's designed to be a direct replacement for your factory crank pulley, but it's significantly lighter. Reducing the rotational mass at the crankshaft means the engine can rev up and down more quickly, which can make the car feel more responsive, especially when you're accelerating or shifting gears.

The engineers at Perrin focused on shedding weight where it matters most. By using a well-built aluminum piece instead of the heavier stock steel pulley, they've managed to cut down on the inertia the engine has to overcome. This isn't about adding horsepower directly, but rather about improving the engine's ability to change speed. It's a popular modification for drivers looking for a more immediate feel from their engine's performance.

When you're installing this, remember that it's a direct bolt-on part. You'll want to make sure you have the right tools to remove the old pulley and install the new one securely. Because it's a lighter component, it can help the engine feel a bit more eager, especially in stop-and-go traffic or during spirited driving.