Ultralight Auto Meter gauges with blue anodized bezel are designed for the extreme conditions of dirt track racing. 2-5/8" diameter. A sealed case keep moisture and debris out. Water proof so they can be hosed off after the races. A glow-in-the-dark face means they don't use light bulbs and eliminates need for light and battery. Keeps them simple and dry.
For standard or electronic ignition.
Mechanical Fuel Pressure Gauge Installation Instructions (PDF)