Now you do not have to change from the good-old cable drive to a transmission mounted electronic speedo when you want to go digital. These digital speedo/tacho combinations are completely stealth as long as your ignition is off, but with the ignition switched on they can indicate speed, engine speed, odometer and trip readings in digital format. These speedos feature a 5/8" cable connector and include an adaptor to 12 mm cables as well. As they are programmable for use with a 1:1, 2:1 or 2240:60 ratio speedometer drive and are 4 1/2" in diameter they fit models with a 1947 thru 1995 style dash. For the tacho-signal, a wire is simply connected to the ignition coil.