Ultra-Lite Series Tachometer AU4499Ultra Lite Series Tachometer5", In Dash, Electronic, Dual Range, Memory, 0 10,000 rpm AU4499 4499 Operates on 4, 6, or 8 cylinder engines with points, electronic, and most 12V high performance racing ignitions. These professional quality Ultra Lite series gauges are of aluminium construction which greatly reduces their weight. While their silver satin gauge face with black accents and a red pointer make these gauges very easy to read.