General Motors has developed a Reconfigurable Performance Display that can be configured to display a “gauge” for a number of different things like horsepower, temperature, boost and so on. The display is a dealer installed option and cost under $300.

GM's Reconfigurable Performance Display can illustrate a wide range of data in gauge form, such as boost, battery voltage, air fuel ratio, cam phase angle, timing, barometric pressure and even torque and horsepower (the later two likely calculated based on other parameters). The device even includes a g-sensor.