Killer B Motorsport Oil Control Valve – Subaru WRX, STi (2002-2007)

This oil control valve keeps oil from flowing out of the head breather ports under high cornering loads.

When oil is allowed to flow out of the head ports, the oil level in the sump can drop, which can cause oil starvation.

Fitment: 2002-2007 WRX, 2002-2007 STi.