Perrin Performance Alternator Pulley for 06-14 WRX / 07-21 STI / 06-13 Forest...

Perrin Performance Lightweight Alternator Pulley Fitment: 2006–2014 Subaru WRX, 2007–2021 Subaru WRX STI, 2006–2013 Subaru Forester Upgrade your Subaru’s accessory drive with the Perrin Performance Alternator Pulley . Machined from high-grade aluminum and finished in durable black, this lightweight pulley reduces rotational mass to help the engine spool more quickly and free up a small amount of horsepower and responsiveness across the RPM range. Reduced rotating mass: Faster engine response and crisper acceleration. Precision machined: High-quality aluminum construction for lasting strength and balanced operation. Direct fit: Designed as a bolt-on replacement for compatible WRX, STI, and Forester models—no modification required. Durable finish: Black anodized coating resists corrosion and complements engine bay aesthetics. Easy installation: Installs with common hand tools; ideal for DIY enthusiasts and professional shops. Whether you’re tuning for daily driving or track use, the Perrin alternator pulley is a simple, effective mod that improves throttle response and engine feel with minimal cost and installation time.