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Katapult Buy now, pay later. No credit required!
Katapult Buy now, pay later. No credit required!


Perrin Air Oil Separator Stock TMIC (Various Colors) 2008-2014 WRX / 2008-2021 STI

Original price $490.50 - Original price $490.50
Original price
$490.50 - $490.50
Current price $490.50
  Lease to own   Pay as low as   $/week
Color: Red

The PERRIN Performance Air Oil Separator traps oil from the crank case vents before it enters the intake, thus increasing intercooler efficiency and reduces chances of performance-robbing detonation.


  • Traps oil from the crankcase ventilation before it enters the intake system
  • Reduces the chances of detonation
  • 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
  • NOT a catch can system
  • Separates engine oil from water vapors and allows the oil to drain back into the engine
  • Oil entering from the crankcase vents spins counterclockwise through the entire body of the AOS that passes along 4 walls equalling 50.25 square inches of surface area
  • Multiple baffle walls in the compact design simulate the surface area of an AOS that is 13.5" tall
  • Comes provided with all necessary hoses and hose fittings
  • Can comes with a red powder-coated finish
  • All hardware, brackets, fittings, and clamps are included to make this AOS system ready for the installation