RaceTech Classic 1 serious 6 Gauge Set Gauges for Car’s Instrument Cluster – Includes GPS Function Speedometer & Tachometer – Volt, Fuel Level, Water Temperature & Oil Pressure Gauge. Measuring Range: Speedometer: 0 – 140 MPH, Tachometer: 0 – 8000 RPM, Volt: 10 – 16 V, Fuel Level: E – F & Resistance 240 – 33 ohms, Water Temperature: 100 – 250 °F, Oil Pressure: 0 – 100 PSI. Speedometer & Tachometer – 85mm (3-3/8). Tachometer Fits Any 1 to 9 Cylinder Gas Powered Engine. Fuel Level, Water Temperature, Oil Pressure & Volt – 52mm (2-1/16). Gauge Set Requires 12 Volt Negative Ground Systems. Swiss Stepper Motor Movement. Convex Glass Lens Surface, Stainless Steel Bezel with Plastic Housing. White Faceplate, Red Needle. Package Includes: 6 Gauges, GPS Sensor & Converter, GPS Antenna & Signal Harness, Water Temperature Sensor (Thread Size: 1/8 NPT), Oil Pressure Sensor (Thread Size: 1/8 NPT), Fuel Level Sender (240 – 33 ohms), Power Harness, Mounting Hardware, Filter x 2 (For Tachometer), Adjustment Stick (For Speedometer), Installation Instructions.