Auto Meter 6174 Cobalt 2-1/16" 0-1600 PSI Full Sweep Electric Nitrous Pressure Gauge Modern blue LED through-the-dial lighting provides clear visibility during nighttime use Includes data acquisition grade solid-state pressure transducer, providing unmatched accuracy and durability even in the harshest environments Auto Meters race proven digital stepper motor electric instruments provide unmatched accuracy while keeping hazardous fluids outside of the vehicle The accuracy of digital stepper motor gauges is further increased by utilizing a self calibration sequence during power up Gauge kit includes 1/8 NPT stainless steel pressure transducer, wiring harness, mounting hardware, and detailed instructions for installation