Perrin Alternator Pulley Black (PSP-ENG-118BK) | Subaru WRX 2002-2005 / STI 2004-2006 / Impreza 1993-2011

The Perrin Alternator Pulley Black replaces the factory steel alternator pulley with a lighter billet aluminum version, reducing rotating mass and adding a subtle OEM+ finish to classic Impreza-based platforms.

KEY FEATURES

• Lightweight billet aluminum alternator pulley
• Black anodized finish for a clean look
• Reduces rotating mass on the accessory drive
• Maintains correct pulley size for proper charging system performance
• Direct-fit replacement for select Impreza, WRX, and STI models

VEHICLE FITMENT

• Subaru WRX (2002–2005)
• Subaru STI (2004–2006)
• Subaru Impreza (1993–2011, select models)

Perrin products are engineered for precision Subaru performance and long-term reliability.