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  • Perrin [22 - 26 WRX] FA/FB Alternator Pulley Black | PSP - ENG - 121BK - JDMusclePulleysperPSP-ENG-121BK
  • Perrin [22 - 26 WRX] FA/FB Alternator Pulley Black | PSP - ENG - 121BK - JDMusclePulleysperPSP-ENG-121BK

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Perrin FA/FB Alternator Pulley - Black

Fits: 22-26 WRX, 14-18 Forester XT, 19-25 Ascent, 21-25 Legacy XT, 21-25 Outback XT/Wilderness

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Auto Parts Store of the Year 2026

Perrin Performance Perrin FA/FB Alternator Pulley - Black
Fits: 22-26 WRX, 14-18 Forester XT, 19-25 Ascent, 21-25 Legacy XT, 21-25 Outback XT/Wilderness
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Fitment

Please Note: PERRIN part number PSP-ENG-121BK (Black); FA/FB alternator pulley.
  • 2022-2026 Subaru | WRX

Description

Remove a future failure point and free up power with the PERRIN FA/FB alternator pulley in black — a precision-machined, lightweight replacement for the OEM clutch-style alternator pulley on the 2022-2026 WRX.

  • PERRIN part number: PSP-ENG-121BK (Black)
  • Replaces the OEM clutch-style alternator pulley, which can fail over time and cause knocking noises, battery charging issues, belt wear, and jumpy belts
  • Weighs just 0.20 lbs — lighter than the OEM pulley for improved throttle response, horsepower, and torque
  • Precision-machined grooves tightly sync with all OEM and aftermarket belts; designed to match the PERRIN crank pulley
  • Machined from 6061 T6 billet aluminum with a black anodized finish, laser etched for increased belt life and a precision fit

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