GFB Mitsubishi EVO4-8 Internal Wastegate Actuator

The WGA is a high-performance internal wastegate actuator designed to improve boost control on internally wastegated turbos. It utilizes a significantly larger diaphragm area than the OEM actuator, providing greater control authority over the wastegate flap. This results in more stable and reliable boost control by preventing exhaust backpressure from easily overriding the flap position. It is supplied with three springs and features a unique turnbuckle pre-load adjustment, allowing the base boost pressure to be configured and adjusted from 5psi to 24psi for optimal boost control. The WGA boasts a longer stroke, shorter height, and more adjustment compared to its rivals. WGA part #7301 is specifically designed to bolt onto EVO 4-8 models with the factory turbo. The 10psi and 7psi springs are pre-installed for a base pressure of 17psi, with an additional 5psi spring included for further tuning options. It's important to note that while this is a physical "bolt-on" product, it should be considered a tuning tool as it WILL increase boost pressure, and therefore, tuning is required.