Perrin Alternator Pulley Blue Subaru STI 2007-2021 | PSP-ENG-119BL vendor_Turbo XS Black = Ground (-)

Black = Ground (-)

Black carbon-like pattern

Air crushing end plates for our 59" Carbon Fiber wing

Go Fast Bits Lightweight Water Pump Pulley for the Scion FR-S / Subaru BRZ

Perrin Alternator Pulley Blue Subaru STI 2007-2021 | PSP-ENG-119BL vendor_Turbo XS Black = Ground (-)Upgrade your Subarus charging system and performance with the PERRIN Alternator Pulley for EJ Engines. Designed specifically for the 2007 2021 Subaru STI, this precision CNCmachined pulley reduces rotational mass while maintaining OEM belt compatibility. Key Benefits & Features Reduced Rotational Mass: At just 0. 116 lbs, this pulley is significantly lighter than the stock alternator pulley (~0. 393 lbs), improving throttle response and overall engine