The Turbosmart IWG75 Twin Port - Borg Warner EFR B1 Twin Scroll - 26PSI (Part #TS-0620-2263) is a high-performance automotive component from Turbosmart. It is all about control The Twin Port IWG-75 uses the air-pressure differential between two sealed chambers to create a dynamic force which overcomes the mechanical spring force in the actuator. Creating a boost curve that is much more precise, and allows for a much wider boost range between minimum boost and maximum boost, than the single tier control offered by conventional actuators. Designed as a direct-fit upgrade with straightforward installation. Backed by Turbosmart's reputation for quality and performance in forced induction systems.