What is a Boost Gauge? A Boost Gauge is a pressure gauge, often mounted on a dashboard, radio slot or driver’s side pillar, which indicates boost pressure in an internal combustion engine. They can be imperative for any vehicle running a turbo or supercharger. GlowShift offers a variety of electronically and mechanically driven boost gauges from which you can select the boost or boost/vacuum gauge that will best assist you in monitoring the boost and/or compression levels of your vehicle. Whether a Diesel Boost Gauge, Turbo Gauge or another version from our catalog, GlowShift is sure to have the type of Boost Gauge you are seeking.