No one knows the EcoBoost motors better than Turbosmart. The Turbosmart BOV for your Focus ST250 is designed as a direct bolt-on replacement of the factory valve system. The kompact shortie is a dual port BOV design which 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 love. The stock blow-off valve is prone to leak under high power applications due to its plastic design. The Turbosmart kompact shortie is constructed from aircraft grade aluminium alloy ensuring no cracking or leaking even under increased boost levels.