Classic instruments is one of the most quality oriented, customer responsive companies on the market. Their guage set may be purchased with or without matchng tachometer. Classic offers quad sets in both 3-3/8" and 5" sizes. The 2 piece quad comes with two guages in one and the speedo-meter in the other. Classic dual sets consist of two 3-3/8" instruments with two guages in each and one 3-3/8" speedo.