BOV Kompact EM Dual Port VR3 The Multiple Award-winning Kompact EM Series of Upgraded Diverter Valves are the world's first truly plug-and-play Upgrade solution for your factory diverter valve. Unplug and unbolt your OEM Valve, and install a Kompact EM Valve. No adaptors, hoses or extra assembly is required. Boost-Balance Valve Technology Patented integrated pressure control True plug-and-play upgrade Integrated proprietary high-temperature solenoid valve Billet construction with high-temperature O-rings .