Precision Works Oil Control Valve Subaru 2008-2014 WRX & 2008-2014 STi EJ25

Eliminate oil surge and cylinder head starvation during hard cornering with this precision-engineered performance upgrade designed specifically for the EJ25 platform. This high-performance oil control valve automatically prevents oil from exiting head ports under extreme lateral G-forces while maintaining full crankcase ventilation during normal driving, acceleration, and braking. Adapted from proven aerobatic aircraft technology and machined in-house using 5-axis CNC precision, it selectively closes affected head ports during severe cornering while other ports continue operating normally—preserving blow-by evacuation with zero performance impact.

• •Direct-fit bolt-on upgrade
• •Prevents oil starvation and overflow onto hot engine components
• •Maintains normal PCV function under standard conditions
• •Precision CNC-machined construction
• •Aircraft-proven design technology

**Fits:** 2008-2014 Subaru WRX & 2008-2014 STi