Features Autometers E-Z View Digital Led Display System Which Maximizes Readability And Minimizes Distracting High Speed Digit Changes. Includes data acquisition grade solid-state MAP Sensor providing unmatched accuracy and durability even in the harshest environments. Autometers Race Proven Digital Stepper Motor Electric Instruments Provide Unmatched Accuracy Which Is Further Increased By Utilizing A Self Calibration Sequence During Power Up. Gauge kit includes MAP Sensor T-Fitting nylon tubing vacuum fittings 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