The AEM 100PSI Fuel Pressure Gauge has a bright LED display that shows fuel pressure in 1 PSI increments, and a sweeping LED "needle" that lines the edge as fuel pressure changes from 0 to 100. This is perfect for those who need to know fuel pressure at high RPM on tuned engines - and now you'll be able to see and log to the exact PSI. Each gauge includes interchangable silver and black bezels and black and white faceplates to personalize the look of your gauge - it's like having 4 gauges in 1!