Perrin - Subaru 15-21 WRX - Air Oil Separator Kit (Wrinkle Black) BF2025 Our EXPREME Manifolds have received

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

The SF Airbox turns your SF Intake into a cold air intake with OEM looks and fit

and sourcing quality hardware

Super low-wear diaphragm spring

2 for competition in NHRA

Perrin - Subaru 15-21 WRX - Air Oil Separator Kit (Wrinkle Black) BF2025 Our EXPREME Manifolds have receivedOVERVIEW 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