GlowShift’s Black 7 Color Series 30,000 PSI Fuel Rail Pressure Gauge reads your diesel truck’s fuel pressure directly from the common rail, allowing you to easily monitor your fuel pressure levels. It is compatible with the 03-18 Dodge Ram with 5.9L or 6.7L Cummins Engine, as well as the 02-18 Chevy and GM with 6.6L Duramax Engine. You’ll also have the classic look of an analog gauge with an illuminated red needle that sweeps 270 degrees and choice of a blue, green, yellow, purple, red, teal or white LED display on a Black gauge face.