The Turbosmart Kompact Shortie series is the world's first aftermarket BOV for the new Mustang and it is truly exciting. The Turbosmart Kompact Shortie valves are designed as a direct replacement for the plastic factory valve that leak and rob the engine of power. They offer a quicker action, better flow and higher strength under boost. The new Mustang EcoBoost Kompact Shortie has been designed, machined and hand assembled in-house. Keeping the process in-house, ensures only the best quality, and the aircraft grade aluminum alloy construction means cracking and leaking even under increased boost levels will never be an issue. The Shortie's dual port design provides one plumb back port to keep the car's computer happy, and a second vent to atmosphere port for that trademark Turbosmart BOV sound we all know and love.