Incredibly high accuracy in both vacuum and boost, AutoMeter's Digital Boost/Vac gauge is engineered to provide the best possible accuracy in applications ranging from 30 in/Hg to 30 psi. Our patented gauge technology allows the gauge to calibrate on every startup to compensate for altitude, barometric pressure and other atmospheric conditions, assuring you of the most precise reading possible. A direct plug in wiring harness is included for ease of installation. A high pressure digital boost only gauge is also available for diesel or high boost gasoline applications.Features: Features AutoMeter's 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 AutoMeter’s 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 Product Description: 2-1/16" Boost/Vacuum Gauge,30 In Hg/30 PSI, Ultra-Lite DigitalPit Stop USA offers Auto Meter Ultra-Lite Digital Boost/Vacuum Gauge - 2-1/16 in. 6559 at low everyday prices. Be sure to check out all our products from Auto Meter including Auto Meter Digital Boost / Vacuum Gauges.