The Racetech 80mm tachometer is a fast acting tachometer with a choice of rev ranges and a compressed scale to provide a more accurate reading higher up the rev range. This particular model includes an integrated 3 stage shift light for accurate shifting and is ideal where cockpit space is limited as an auxiliary shift light is not required.Suitable for use with 4, 6 or 8 cylinder engines with 12 volt negative earth, single coil ignition systems.