Cause a storm with Thunderbird Boost Controller. Adjust your turbo's power with a Boost Controller. Stop people dead in their tracks after you update your Thunderbird Boost Controller. Choose the amount of boost with the Boost Controller for the optimum setup. Cause a little ruckus with your Thunderbird Boost Controller. A Boost Controller is easily adjusted and easily installed. Make your engine the best it can be with a new Boost Controller.