Perrin Alternator Pulley Blue 2006-2014 WRX / 2007-2021 STI / 2012-2016 Impreza / 2006-2013 Forester XT / 2005-2009 Legacy / 2004-2009 Outback

Upgrade your Subaru’s engine performance with the Perrin Alternator Pulley, designed specifically for WRX, Subaru WRX STI, Impreza, Forester XT, Legacy, and Outback models from 2004 to 2021. This premium pulley reduces rotational mass, allowing your engine to rev more freely and deliver improved throttle response for a noticeable boost in power and efficiency.

Crafted from precision-machined 6061-T6 aluminum with a durable anodized blue finish, the Perrin pulley is lightweight yet strong. It directly replaces the factory steel pulley without requiring any modifications or tuning, ensuring a seamless, hassle-free installation. Compatible with both OEM and aftermarket belts, it maintains charging system reliability while enhancing engine responsiveness.

Ideal for Subaru enthusiasts seeking subtle but effective performance gains in daily driving or track use, this pulley offers a trusted upgrade that balances quality construction with real-world benefits.