Perrin 15-21 Subaru WRX Lightweight Water Pump Pulley - Black

By replacing the OEM pulley with this aftermarket pulley, which weighs only 0.48 lbs compared to the OEM's 0.28 lbs, the vehicle can benefit from improved performance. The lighter weight of the pulley reduces the overall rotating mass in the engine, which in turn frees up horsepower that can be sent to the wheels. This can result in improved throttle response, as the engine doesn't need to work as hard to achieve the same level of power output.

The use of 6061 T6 aluminum ensures durability and strength while keeping the pulley relatively lightweight. The laser etching not only adds a stylish appearance but also contributes to a longer belt life. The precision fit of the pulley helps maintain optimal performance and ensures that the belt operates smoothly.