AEM Boost Gauges are available in two levels of boost either -30inHg to 35psi (SAE) and -1 to 2.4BAR (Metric) for vehicles not running conservative levels of boost or 0inHg to 60psi (SAE) or -1 to 4.1BAR (Metric) for those running high levels of boost. Boost gauge includes AEM 35psi (2.4BAR) or 75psi (4.1BAR) brass sensor. All AEM Analog Gauges have seven built in backlight colors and each gauge comes with a silver and black bezel and a back and white face.