PERRIN 15-21 Subaru WRX / 18-20 Crosstrek / 14-18 FXT Lightweight Water Pump Pulley - Blue

Crafted from 6061-T6 aluminum, this Perrin water pump pulley is designed to reduce rotational mass on your Subaru's engine. By shaving off weight compared to the stock pulley, it allows your engine to rev more freely, leading to a more responsive feel when you accelerate. The blue anodized finish not only looks sharp under the hood but also helps protect the aluminum from corrosion.

Swapping out the factory pulley for this lighter version is a straightforward modification. It's a popular choice for WRX owners looking for small, effective ways to get a bit more pep out of their engine. While the gains are subtle, many drivers notice an improved throttle response, especially in the mid-range RPMs. This pulley is a well-built piece that fits right into your existing cooling system setup.