Auto Meter Z-Series 2-1/16 inch (52.4 millimeter) 0-30 PSI Full Sweep Electric Fuel Pressure Gauge. It is 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. Includes 1/8 inch NPT Sender. When installing this product on feet98-02 Dode Cummins Diesel application, Auto Meter Fuel Pressure Snubber / Restrictor fitting 3279 is required.