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

along with four 3/8" bolts for secure installation

D15B7 / D15B8 / D16A6 / D16Z6 / D16Y7 / D16Z6 variants

simple and quick with the PERRIN Blow Off Valve

track-focused setups

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