2 1/16", 0-3k diesel tach with white LED backlighting. Our new 2 1/16" diesel tach part number R12502 is built in our factory in Portland, OR. It replaces part number R5501. R12502 features the same font as EV², with LED backlighting for improved visibility at night. This gauge is sold with a bracket and wiring harness; it designed to tie into our magnetic kits or our Dodge 92 and above tach wiring harness, R8912-92. It is designed to work with 2 pulses per rev or less; the tach cannot be hooked up to a mag sensor, alternator, ignition, etc. It will only work with a magnetic sensor kit. *For installation in Dodge 91.5 and above, our new filter harness part number R8913 will allow you to wire our tach directly to the factory sensor without R8912-92 tach harness sensor kit part number.*