No one knows the EcoBoost motors better than Turbosmart. The Turbosmart BOV for your Focus ST250 or ST225 is designed as a direct bolt-on replacement of the factory valve system. The kompact shortie is a dual-port BOV design that 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.