WGA 7304 Internal Wastegate Actuator for all Subaru WRX TD04Designed to improve boost control The WGA is a high performance internal wastegate actuator designed to improve boost control on internally wastegated turbos. By using a significantly larger diaphragm area than the OEM actuator, the WGA has more control authority over the wastegate flap, meaning exhaust backpressure cannot override the flap position as easily, resulting in more stable and reliable boost control. Supplied with 3 springs and a unique