The PERRIN Air Oil Separator traps oil from the crank case vents before it enters the intake, reduces carbon build-up, increases intercooler efficiency, which reduces the chance of performance-robbing detonation.
WHY YOU NEED IT
The AOS increases intercooler efficiency by reducing the amount of oil deposited into your intercooler and intake system! As blow-by/oil builds up inside your intercooler, the less efficient it becomes due to less heat being transferred away from your engine. This leads to power loss and detonation, which can be damaging to your engine.
Reduce carbon build up in the combustion chamber, intake valves, and in your intake tract. Crank case blow-by is recirculated back to the intake to be ingested by the engine, but in doing so, gets stuck in the intake tract, intake valves, and the intercooler. This builds up over time which causes a loss in power and extra wear and tear on your valve train.
The PERRIN Air Oil Separator is not a catch can. Catch cans capture and water and oil vapor filling with a sticky oily mess requiring it to be emptied. The PERRIN AOS separates engine oil from water vapor and allows it to drain back into the engine. Oil entering from the crankcase vents spins counter clockwise through the entire body of the AOS, passing along four walls equaling roughly 50.25 sq/in of surface area. The multiple baffle walls in our compact design simulate the surface area of an AOS that is 13.5" tall!
As oil accumulates on all the walls, gravity pulls it to the bottom of the can where it drains back to the engine block while water vapor and air merge with the intake air and are reburied in the engine. This means no maintenance or upkeep.
HEATED BY COOLANT
The base plate of the air oil separator is heated by coolant drawn from the engine. This heats the entire air oil separator to the same temperature of the engine blow-by, water condensation is significantly decreased, allowing oil, air and water vapor to separate and pass through the body.
This vital feature eliminates nearly all the sludge that can build up in the air oil separator body, which is a common problem with catch cans and other air oil separators.
FA AOS – PERRIN TURBO SUMP RESTRICTOR
Included with the PERRIN Air Oil Separator for the 2015-2018 WRX. The PERRIN Air Oil Separator fixes burning oil issues related to turbo back exhausts or Stage 2 and higher tunes.
Click here to learn more about the PERRIN TURBO SUMP RESTRICTOR
ESTIMATED DIY INSTALL TIME: 3 HOURS
Instructions for 2015-2018 WRX
Worry-Free 5-Year Warranty. Read full warranty.
What's In The Box
(1) PERRIN Air Oil Separator
(1) Car Specific Bracket
(1) PERRIN License Plate Frame
All necessary hardware
Warranty, instructions, stickers
PERRIN Air Oil Separator Kit for 15-18 WRX Black Wrinkle Finish
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