Keep your SUV happy with X3 Boost Controller. Adjust your turbo's power with a Boost Controller. Haul the kids or the groceries with new X3 Boost Controller. Choose the amount of boost with the Boost Controller for the optimum setup. A small SUV doesn't mean it can't be fun, try new X3 Boost Controller today. A Boost Controller is easily adjusted and easily installed. Make your engine the best it can be with a new Boost Controller.