Turbosmart - Compressed Gas (CO2) StraightGate50 – Inbuilt Solenoids – 7PSI Black (Control In Cap CO2 Boost Control)Turbosmart Compressed Gas (CO2) StraightGate50 Inbuilt Solenoids 7PSI Black (Control In Cap CO2 Boost Control) The Compressed Gas StraightGate50 (solenoid) is the first ever boost control integrated CO2 operated external wastegate. Turbosmart has taken the complexity of out of CO2 boost control by taking the spill and fill control solenoids as well as the dome pressure sensor required for CO2 boost control and integrating them directly into the