Defi Racer Gauge Red Metric - 2.362 in EGT Racer gauges are high accuracy, fast response analog gauges. The dial is not visible until the ignition is turned on. The gauges operate independently and the control unit is not needed. Diameters are 2 1/16 (2.047 in) and 2 3/8 (2.362 in). Boost, pressure, temperature, exhaust temperature and volt gauges are available. Tachometer is also available and diameter is 3 1/8 (3.150 in). Scale range is 9000RPM and 11000RPM. Racer gauges cannot be linked to the Defi-Link system or the ADVANCE system.