Turbosmart Kompact Dual Port BOV Suit MY99-00 WRX, STI And MY98-00 Forester GTTurbosmart Kompact Dual Port BOV Suit MY99 00 WRX, STI And MY98 00 Forester GT Dual outlet type BOV designed specifically for the Subaru 98 00 Forester and MY99 WRX. The Kompact Dual Port vents both to the atmosphere and back into the air intake. Ports with sequential timing allow quieter operation during normal driving, while still offering the performance and sound of a vent to atmosphere BOV when the going gets harder. The Turbosmart Kompact valve