Turbosmart 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.Turbosmart's IWG-75 Internal Wastegate Actuator allows more precise control over the flow of exhaust gas to the turbocharger compared to the stock actuator.