The GFB Internal Wastegate Actuator for Mitsubishi EVO4 - 8 offers massive performance in a compact size. It features an industry - first diaphragm design. The Silicone/Nomex diaphragm uses a new bead retention design, achieving the largest effective area with a small outside diameter. This gives it better control over the wastegate flap, leading to superior boost control. With an 18mm rod travel, it has the longest stroke, suitable for large internal wastegates or increasing boost pressure without changing springs. The unique pivoting rod guide, machined from PEEK, takes up less height in the actuator body, offers low friction, and has great wear resistance. It's also the shortest actuator on the market. It's more adjustable and easier to use. We supply 3 stainless - steel springs with a range from 5psi to 22psi. Plus, it has a turnbuckle adjustment, allowing you to fine - tune boost pressure in minutes without swapping springs or removing the actuator. Available in bolt - on or universal kits. Check the GFB website for details. This part fits 2003 - 2005 Mitsubishi Lancer Evolution.

Using the GFB Internal Wastegate Actuator for your Mitsubishi EVO4 - 8 is straightforward. First, make sure to select the right spring combination for your needs from the 3 stainless - steel springs provided. You can adjust the base spring pressure easily with the turnbuckle adjustment. This lets you fine - tune the boost pressure without the hassle of changing springs. When installing, follow the instructions provided with your bolt - on or universal kit. For maintenance, keep the actuator clean and check the rod guide regularly for any signs of wear. If you notice any issues, contact the GFB support team. Also, always make sure to follow the safety instructions during installation and operation.