Autometer Electric Pyrometer Gauge for the Chevy Camaro. Autometer is a leader in after market performance gauges.

This is from the Cobalt Series of gauges.  Its diameter is 2 1/16" (52.4mm) with a range of 0-1600 degrees F.    

This is a full sweep, stepper motor movement gauge and an air core meter movement.

The gauge comes with Type K Thermocouple