Killer B Oil Control Valve 2002-2007 Subaru WRX/STI - OCV1Killer B Motorsport Baffle. Closed rear section to prevent oil from sloshing into the crank under hard acceleration and aggressive shifts. Block contoured profile to minimize oil returning from the heads interfering with the crank. Directional louvers prevent oil in the pan from splash sloshing into the crank. Low profile design to control windage and strip oil from the crank immediately to reduce oil roping on the crank. Improved oil entry to the pan