Perrin - Subaru 08-14 WRX/STI - Air Oil Separator (Black) subaru-wrx-2026 Available in Sleek Silver or

Available in Sleek Silver or Stealth Black finish

Billet 6061-T6 Construction

arguably one of the most aesthetically challenged OEM parts in the engine bay

Improved noise reduction with the same performance

375" thick flanges are used for a complete 360-degree sealing surface

Perrin - Subaru 08-14 WRX/STI - Air Oil Separator (Black) subaru-wrx-2026 Available in Sleek Silver orOVERVIEW The PERRIN Air Oil Separator traps oil from the crankcase vents before it enters the intake, reduces carbon build up, increases intercooler efficiency, which reduces the chance of performance robbing detonation. NO TUNING REQUIRED Increase horsepower and torque without ECU recalibration or tune! This part is designed and tested to work safely on your vehicle without any tuning required! However, more power can be gained with proper ECU