Turbosmart - Subaru/Nissan Kompact Dual Port BOVTurbosmart Subaru Nissan Kompact Dual Port BOV The Kompact Dual Port blow off valve directly replaces the stock bypass valve on the Subaru WRX MY08 14 and the new Nissan Juke Pulsar Turbo. Standard valves crack with age and heat cycling and rely on rubber diaphragms that perish. Theyre also not designed to handle increased boost levels. Turbosmarts Kompact offers big blow off valve performance in a small package. Its billet aluminium construction