Perrin Air Oil Separator Kit (AOS) Black 2015-2021 WRX

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.

FEATURES:

• Not A Catch Can - The air oil separator separates the oil from the air while draining it back to the engine
• Swirl Pot Technology - The multi-layer baffle design forces incoming engine blow-by to move rapidly across the baffles to separate oil from the engine blow-by
• Heated By Coolant - The base plate of the air oil separator is heated by coolant drawn from the engine which heats the entire air oil separator to the same temperature of the engine blow-by to reduce condensation
• Increases intercooler efficiency
• Reduces carbon buildup
• Includes CNC machined fittings
• Includes PERRIN Turbo Sump Pump Restrictor
• Includes a custom purpose built crankcase fitting
• Includes all necessary hardware
• Red Wrinkle finish