Perrin - Subaru 15-21 WRX - Air Oil Separator Kit (Neon Yellow) subaru-forester-xt-2010 The unique design allows you

The unique design allows you to control the volume of air released when the blow off valve vents

we got to work designing end tanks that offered smooth flow

The COBB Catback exhaust for the WRX & STI does not deviate from the factory emissions equipment and conforms to the SAE dictated 95-decibel exhaust noise level limit enforced by California

this kit includes a large 19-row cooler that is mounted in the front bumper with robust application-specific brackets

Perrin - Subaru 15-21 WRX - Air Oil Separator Kit (Neon Yellow) subaru-forester-xt-2010 The unique design allows youOVERVIEW 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