This is the hole that is cut in the dash for the case of the gauge to fit through. Tachs and Speedos will have larger cut-outs than gauges such as your voltmeter, water temperature, oil pressure, etc... All gauges that we sell are measured by their cut-out size. These are the most common cut-out sizes:
- 2-1/16" - Standard Size Guages. Water Temp, Volts, Oil Pressure, etc...
- 2-5/8" - Monster Size Guages. Water Temp, Volts, Oil Pressure, etc...
- 3-3/8" - Standard Size Tachometer or Speedometer
- 4-5/8" - Monster Size Tachometer or Speedometer