VERUS ENGINEERING A0323A-RED Air Oil Separator Kit, Red for SUBARU WRX / STI (VA)

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VERUS ENGINEERING A0323A-RED Air Oil Separator Kit, Red for SUBARU WRX / STI (VA) The VERUS ENGINEERING A0323A-RED Air Oil Separator (AOS) is designed to keep the intake system on Subaru WRX / STI (VA) models free from oil contamination. Oil entering the intake system reduces effective octane, which can lead to detonation, power loss, and carbon buildup. This AOS installs in an OE-style configuration and does not require any changes to engine tuning or calibration. The system filters