Turbosmart Universal IWG75 Borg Warner EFR Twin Port B2 Single Scroll 160mm Rod Black 14PSI IWGTurbosmart Upgraded Wastegate Actuators have been developed to provide the maximum possible boost response for your factory frame turbocharger. The Turbosmart IWG75 Series of upgraded Actuators benefit from an increased 'Working Ratio' over the factory equipment resulting in improved boost response throughout the RPM range.