Free up power and sharpen throttle response — the PERRIN Lightweight Crank Pulley is a must-have performance upgrade for your WRX or STI. Weighing in at just 1.2 lbs, the...
Free up power and sharpen throttle response — the PERRIN Lightweight Crank Pulley is a must-have performance upgrade for your WRX or STI.
Weighing in at just 1.2 lbs, the PERRIN Crank Pulley shaves an impressive 3.7 lbs off the rotating mass compared to the stock pulley. This weight reduction is the equivalent of removing over 100 lbs of static vehicle weight — delivering noticeable gains in throttle response, horsepower, and torque.
CNC-machined from high-grade aluminum and finished in a sleek anodized coating, this pulley isn’t just lighter — it’s stronger, more efficient, and built to last. A direct OEM replacement, it installs easily with no special tuning or modification required.
Weighs only 1.2 lbs — 3.7 lbs lighter than OEM
Reduces rotating mass for faster engine response
Increases horsepower and torque across the powerband
CNC-machined from 6061-T6 aluminum
Anodized finish for corrosion resistance and durability
Balanced to OE standards for smooth operation
Direct-fit replacement — no tuning required
What’s in the Box:
PERRIN Lightweight Crank Pulley
Installation Instructions
Warranty Information
Fitment: Subaru WRX & STI (please confirm compatibility by year/model)
Installation: Difficulty: ★★☆☆☆ Time: 30–60 min Tools Required: Impact wrench or crank pulley tool recommended Instructions: [View Here]
