Turbosmart Kompact Dual Port Blow Off Valve BOV Nissan and Subaru TURBOSMART DUAL PORT BOV. Pac Performance Racing Turbosmart TS 0223 1293 Kompact EM Plumb Back Valve VR10 06 13 Mini Turbosmart BOV Kompact Dual Port Universal Turbosmart BOV Kompact Dual Port 20mm T.I. Performance. Dual Port vents both to the atmosphere & back into the air intake. Ports with sequential timing allow quieter operation during normal driving, while getting all the benefits of a vent to atmosphere BOV under race conditions. This Part Fits: Year Make Model Submodel 2009 2013 Mini Cooper John Cooper Works 2007 2013 Mini Cooper S