This allows you to change turbo boost pressure without buying or burning a new chip. Eliminates ECU control of boost. Installs in the electrical box near the original boost solenoid. Do not disconnect original boost solenoid or you will end up with a check engine light.

After testing several boost controllers available on the market, we came to the conclusion that the best solution for manual adjustment of boost pressure is the ball and spring type controller. Tailored to Lotus Esprit Turbo applications.