Auto Meter 2-5/8 inch (66.7 millimeter) Vacuum/Boost, 30 in. Hg/30 pounds per square inch, Full Sweet Electric, Pro-Comp Pro are powered by digital microprocessor-controlled, rugged stepper motor drives and laboratory grade sending units. These Full Sweep Electric Gauges are the BEST gauges available. They combine Extreme Durability and Readability of 270 degree sweep mechanical gauges with the easy installation and safe operation of short sweep electrics. Track tested and race proven, these units use precision senders to keep hazardous fluids out of the driver compartment and perform gauge calibration and sensor diagnostics at power up for extreme accuracy, every time. Most units compatible with Auto Meter Data Logger for the ultimate race info center. Full Sweep, Stepper Motor meter movement. Features include peak recall/memory, expanded viewable dial area for greater visibility while maintaining compact size, MSS connectors providing sealed contacts with daisy chain wiring to simplify installation and interior panel removal during tear downs and user progra millimeterable full dial red LED illumination gated warning points with flashing overwarn feature. Powered by advanced circuit designs for improved eletrical noise resistance and precision. Requires use of 14, 24, or 44 Channel Ultra-Lite Pro data acquisition systems for operation. Sensor and cabling sold separately.