Perrin - Subaru 15-21 WRX - Air Oil Separator Kit (Wrinkle Black) BF2025 Super low-wear diaphragm spring

Super low-wear diaphragm spring

the OEM tow hook provided by the manufacturer

2 for competition in NHRA

Our EXPREME Manifolds have received numerous high appraisals on all aspects of efficiency

Perrin - Subaru 15-21 WRX - Air Oil Separator Kit (Wrinkle Black) BF2025 Super low-wear diaphragm springOVERVIEW 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