Perrin - Subaru 02-07 WRX/STI - Air Oil Separator (Black) subaru-forester-xt-2014 Made of high-grade silicone and

Made of high-grade silicone and heat-resistant embedded fibers

*STI (8mm pipe)

Invidia Turbo Manifolds are then constructed from SUS Stainless Steel before going thru a rigorous inspection process for consistent quality

which requires no cutting or drilling

upgrading to a 3-port solenoid does require tuning

Perrin - Subaru 02-07 WRX/STI - Air Oil Separator (Black) subaru-forester-xt-2014 Made of high-grade silicone andOVERVIEW 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