Auto Meter Sport-Compact Fuel Pressure Gauge is a must when pressure adjustments are necessary. Auto meter Sport-Compact series is a hardcore instrument panel that will stand up to any brutal racing environment. Years of experience designing versatile gauges have made the Sport-Compact series the ultimate choice of racers worldwide. Sport-Compact gauges include mounting hardware and light. It became the absolute standard in all forms of racing due to its bold appearance, state-of-the-art technology and unrelenting construction. The fuel pressure gauge is a useful tool to verify that your vehicle is maintaining proper fuel pressure and it allows you to accurately make adjustments when using an aftermarket adjustable fuel pressure regulator. The overall diameter of this mechanical boost gauge is 2-1/4 and reads from 0-100 PSI. The mounting hole is 2-1/16 and the mounting depth is 1-9/16 (3 including rear mounting shaft). The gauge face color is black and the gauge number color is white. It includes red and green bulb covers for customized look.