TURBOSMART BOV DUAL PORT SUBARU-BLACKEasy to install and set up, the Turbosmart Dual Port BOV to suit Subaru features sequential ports for quiet operation on mild boost and full performance at full boost. SUPPLIED WITH: Blanking Plug, Yellow Spring rated 22 to 20 InHg (installed), Replacement Oil Breather Hose and Fittings, and a Gasket. Subaru Dual Port can only be run in either Dual Port or Plumb back configurations due to design of the factory return hose. BOV5 Dual Port BOV Blanking