Radium Engineering AOS-R Air/Oil Separator Kit – Subaru WRX/STI 2002–2007

The Radium Engineering AOS-R air/oil separator kit for selected 2002–2007 Subaru WRX and STI applications helps separate blow-by oil from crankcase ventilation gases before they enter the intake system.

Features

• Oil-return AOS-R design directs collected oil back to the oil pan
• Integrated heater helps limit water condensation
• Water trap around the base of the separator
• Designed for suitable modified Subaru engines with elevated blow-by

Part number: 20-0207-02

Check model year, engine and crankcase plumbing configuration before ordering. See other Subaru performance parts.