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Regular Price: $61.00 - Instant discount: $9.15 = $51.85
Product Fitment:
2007-2021 Subaru STI
Upgrade your Subaru’s accessory drive with the Perrin Alternator Pulley for your Subaru STI, designed to reduce rotational mass and sharpen engine response.
The Perrin unit weighs just 0.116 lbs — a significant drop from the OEM pulley’s ~0.393 lbs — meaning less parasitic drag and more usable power.
CNC-machined from 6061‑T6 billet aluminum
Available in anodized colors (black, red, blue) with laser etching
Precisely grooved to mesh cleanly with OEM and upgraded belts
Matches the aesthetic of the Perrin lightweight crank pulley design
Performance benefits include improvements in throttle response, slight gains in horsepower and torque (due to reduced drag), and a visually cleaner engine bay.
What’s in the Box:
Installation Notes:
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