Straight from our Japanese Domestic Market is our SMI line of linkable meters. The GReddy SM Intergate (Stepping Motor Drive Integrate) metric gauges connect upto 6 SMI meters (Turbo, Exhaust Gas Temp, Oil Pressure, Water Temp, Fuel Pressure, & Oil Temp.) with the GReddy Control Unit. The simplified wiring with the SMI has never been easier. The Control Unit allows for easy usage of Warning and Peak Hold Functions. The unit can also record upto 40sec. of data with the built-in memory. Plus the is the stylish interactive start-up display on the classic easy to read GReddy gauge face. Ideal for set-ups with 3 or more gauges. (LIMITED SUPPLY)