Precision Works Air Oil Separator - Subaru WRX & STi (RED/BLACK) PW-SUB-AOS-BLK

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

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