Perrin Alternator Pulley Blue Subaru STI 2007-2021 | PSP-ENG-119BL vendor_Turbo XS Weight Savings of Over 75%

Weight Savings of Over 75%

high-performance look to Scion FR-S

Black = Ground (-)

If you want to keep things looking stealthy under the hood we also have an air box available as well (You can select this from the drop downs below)

Perrin Alternator Pulley Blue Subaru STI 2007-2021 | PSP-ENG-119BL vendor_Turbo XS Weight Savings of Over 75%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