GFB WGA Internal Wastegate Actuator

The GFB WGA Internal Wastegate Actuator from Go Fast Bits is a high-performance wastegate actuator. It improves boost control on turbo systems that have an internal wastegate. It is designed and manufactured by GFB as an upgrade over the factory-fitted actuator, and it suits drivers who want steadier, more tunable boost.

Key Features:

• Large-area diaphragm: A Nomex-reinforced silicone diaphragm gives the largest effective area for its outside diameter. This gives the actuator more control over the wastegate flap, so exhaust backpressure is less able to push the flap open.
• Pivoting rod guide: The encapsulated spherical rod guide is machined from PEEK engineering polymer. It offers low friction and high wear resistance while taking up little height in the actuator body.
• Compact design: GFB designed the WGA to be very short for its performance.
• Long stroke: The rod has 18 mm of travel. This suits large internal wastegates, and the extra travel can be used to raise boost without changing springs.
• Adjustable spring pressure: The actuator uses stainless steel springs that can be combined to set the base pressure. Turnbuckle adjustment lets you fine-tune base boost in minutes, often without removing the actuator from the vehicle.
• Heat protection: An internal shroud protects the valve stem from excessive heat and helps prevent carbon-related sticking.
• Made in Australia under ISO 9001.

Benefits compared with a factory actuator: faster spool-up, less boost taper at high RPM, more stable boost control, customizable spring rates, and support for higher boost pressure.

Each part number in the GFB WGA range is built for a specific turbo application. Check the individual product listing for the part number that matches your turbo.