Perrin [22-26 WRX] FA/FB Alternator Pulley Blue | PSP-ENG-121BL Car Stereo Systems Gate spacing (side-to-side movement) is

Gate spacing (side-to-side movement) is also adjustable up to 5% shorter

We crushed the competition by including a steel bearing in the larger bushing

Whether you are looking to clean up the look of your brake after upgrading to a larger wheel or just tired of cleaning the brake dust that keeps getting on your wheels

and more precise gear engagement under load—ideal for high-performance street or track builds

Designed specifically for 2015–2022 WRX models equipped with the OEM short throw shifter

Perrin [22-26 WRX] FA/FB Alternator Pulley Blue | PSP-ENG-121BL Car Stereo Systems Gate spacing (side-to-side movement) isPREVENT FUTURE FAILURESubaru models with OEM clutch style alternator pulleys may fail over time. This failure can lead to knocking noises, battery charging issues, belt wear, and cause belts to become extra jumpy. The PERRIN Alternator Pulley removes this future failure point. DECREASE ROTATIONAL MASSPERRIN Alternator Pulleys weigh just 0. 20 lbs., which is lighter than the OEM alternator pulley. Throttle response, horsepower, and torque are all