Racetech 80mm electronic rev counters. These superb tachometers are selectable for 4, 6 or 8 cylinder engines running a 12 volt negative earth, single coil ignition systems. Three popular rev ranges available, 0-8000rpm, 0-10,000rpm and 0-12,000rpm, with a compressed lower end scale to allow for a smoother, more accurate upper rev range display. Supplied with a backlight facility, to fit perfectly into an 80mm diameter dashboard mounting hole. They feature a traditional clamping bracket to the rear that secures the gauge in place behind the dashboard. These gauges feature a black bezel and a black face with white numerals, coloured markings and white needles. Part of the Racetech 80mm gauge range, which includes matching diameter Speedometers, for a balanced symmetrical dash layout.