Factory matched LED through-the-dial lighting provides clear visibility during nighttime use and matches OEM instrumentation. Includes data acquisition grade solid-state pressure transducer providing unmatched accuracy and durability even in the harshest environments. Autometers Race Proven Digital Stepper Motor Electric Instruments Provide Unmatched Accuracy While Keeping Hazardous Gases 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 copper tubing kit wiring harness mounting hardware and detailed instructions for installation. 12 and 16 volt compatible compatible with nearly every street car or race car electrical system. Recommended Particle Trap Kit (#5375) available separately for increased lifespan of the pressure transducer and ease of gauge hardware maintenance