Perrin Air Oil Separator Subaru WRX & STI

Original price was: $486.20.Current price is: $420.00.

The Perrin air oil separators are compatible with all 2004-2021 Subaru WRX STi’s and 2002-2021 Subaru WRX’s. Whether your car uses an EJ20, EJ25, or even FA20 Perrin has you covered with a bolt in AOS. Simply put using an Air Oil Separator (AOS) keeps carbon build up out of your engine which means more power and cleaner intake, ports valves and combustion chamber. The Perrin AOS is a MUST have part for any FA20 (2015+ WRX) the 15+ WRX FA20 engine is direct injection which means there is no fuel washing the intake valve/port. This leads to carbon build up and expensive services that can all be avoided simply by using the Perrin AOS.

Please choose your year/model/intercooler option below to ensure perfect fitment for your car.

Perrin AOS Options and fitment

  • Choose Year/model *

  • Intercooler type *

  • Color Options *

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SKU: perPSP-ENG-60xxx Categories: ,