Product Description
Fitment Information:
2022-2024 Subaru WRX (left-hand drive only)
Features:
Crank case blow-by gets recirculated back to the intake to be ingested by the engine, but in doing so, it gets stuck in the intake tract, intake valves, and the intercooler. As it builds up over time, it causes extra wear and tear on your valve train potentially causing extensive damage to your engine. Blow-by/oil can also build up inside your intercooler which makes it less efficient due to less heat being transferred away from your engine, also leading to power loss and detonation.
The PERRIN Air Oil Separator prevents oil from entering the intake by capturing it from the crankcase vents. This reduces carbon build-up in the combustion chamber, intake valves, and in your intake tract, as well as improves intercooler efficiency and lowers the risk of performance-degrading detonation.
Included with this AOS is the Perrin Turbo Sump Pump Restrictor which fixes burning oil issues relating to turboback exhausts, or stage 2 and higher tunes. Also, the unique crankcase vent fitting allows for placement of the AOS in the perfect location to mantain the ideal temperature while staying out of the way of aftermarket TMIC's, FMIC's, and other engine bay components. Each Perrin AOS is designed to connect to each crankcase vent location separately without requiring any T-connections to allow for better venting and reduce the chance of oil being ingested during high G corners.
Durable Wrinke Neon Yellow Powder Coating
Low-profile CNC machined aluminum fittings
Black anodized fittings for a sleek look and corrosion resistance
Traps oil from the crankcase ventilation before it enters the intake system
Separates engine oil from water vapors and allows the oil to drain back into the engine
Swirl pot technology for a rapid and efficient system
Base plate is heated by the coolant drawn from the engine which eliminates nearly all the sludge typical in other AOS systems
Increases intercooler efficiency by reducing the amount of oil deposited into your intercooler and intake system
Reduces carbon buildup in the combustion chamber, intake valves, and intake tract
Reduces the chances of detonation
Helps increase horsepower and torque
No Tuning Required
Installation Instructions
What's in the Box:
(1) PERRIN Air Oil Separator
(1) Car-Specific Mounting Bracket
(1) PERRIN License Plate Frame
All necessary hardware for the installation
Warranty & Instructions
Usually ships same or next day. 
