Dash Board Instruments

The fitting of digital display instruments are not permitted
A number of these gauges have the capability to perform other functions besides temperature, rpm etc.

Integrated dash display systems or Tachometers with integrated dash display systems are not permitted.

A period shape Analogue type display gauge is acceptable

Trip Meters. 

Digital display trip meters are permitted. These may be LCD or LED display.

Speedometers.

Digital speedometers with a digital odometer display are permitted.