Precision Works AOS Air Oil Separator - Subaru WRX 02-07 STi 04-19

Precision Works AOS Air Oil Separator - Subaru WRX 02-07 STi 04-19

Air oil separator removes oil from engine ventilation system so the oil does not get into the intake system.

Key Features:

• Retains OEM PCV valve
• Engine performs cleaner & efficiently 
• Precision CNC machined
• 6061 billet aluminum
• High quality continental hose
  
• Includes fittings, caps, and zip ties
  

Designed to work with the following Subaru:

• Subaru WRX 02-07
• Subaru STi 04-19

Check out the AOS system for the 2015+ WRX here.