GFB WGA Wastegate Actuator (Tune Required) 2008+ Mitsubishi Lancer Ralliart (4B11T) - 7300Massive Performance, Compact Size. Its what we like to do here at GFB maximize performance and minimize size. Heres how we did it with the WGA: Industry first diaphragm design the WGAs Silicone Nomex diaphragm uses a new bead retention design that achieves the largest effective area with the smallest possible outside diameter. This keeps the overall size of the WGA down whilst giving it more control authority over the wastegate flap, resulting in