Perrin - Subaru 04-14 STI - FMIC Air Oil Separator (Black) BF2025 with a larger diameter over

with a larger diameter over the stock hose and the absence of a pleated section

Specifications:

especially for those interested in racing their 2015 WRX or even towing a small trailer

heat tolerance

Designed for Stock Turbo Applications

Perrin - Subaru 04-14 STI - FMIC Air Oil Separator (Black) BF2025 with a larger diameter overOVERVIEW 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