Free up power and sharpen throttle response with the Perrin Lightweight Crank Pulley—a must-have performance upgrade for your WRX or STI.

Massive Weight Reduction

Weighing just 1.2 lbs, the Perrin Crank Pulley shaves an impressive 3.7 lbs off rotating mass compared to stock. This weight reduction is equivalent to removing over 100 lbs of static vehicle weight, delivering noticeable gains in throttle response, horsepower, and torque across the powerband.

Premium Construction

CNC-machined from high-grade 6061-T6 aluminum with a sleek anodized finish for corrosion resistance and durability. Balanced to OE standards for smooth operation. This pulley isn't just lighter—it's stronger, more efficient, and built to last.

Key Benefits:

• 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
• Balanced to OE standards for smooth operation
• Direct-fit replacement—no tuning required
• Easy installation (30-60 minutes)

What's Included:

• Perrin Lightweight Crank Pulley
• Installation instructions

Fitment: Subaru WRX & STI (confirm compatibility by year/model)

Installation Note: Impact wrench or crank pulley tool recommended

Warranty: Perrin Limited Warranty

PROPOSITION 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov