The Kompact EM range of blow-off valves from Turbosmart utilizes full electronic integration while providing a genuine upgrade in reliability and performance over the factory valve. The Kompact EM valve bolts directly in place of the factory unit and plugs directly into the factory connector. No adapters, hoses, or extra assembly required. This represents a key differentiator of the Kompact EM line over conventional pneumatic valves. Traditionally, a mechanical valve would require an external vacuum source, which means more hardware and more changes to your car. The EM valve eliminates this need by using an internal pressure reference and a gated control system which is electrically actuated by a high-speed solenoid. The Kompact EM range is available in both Plumb back & Dual Port, meaning you can enjoy the performance and reliability benefits, no matter your preference for noise.