inputs.text: nice gauge - bought wanted engine tach tractors however tach designed vehicles accommodate 4 cylinder 6 cylinder 8 cylinder engine install pretty simple red wires ignition positive black wires ground green wire negative side engine coil screwed gauge onto dash installing vehicle exactly love pretty blue glow gauge light best gauge responsivewhen idling needle gauge stays right rpm wont jump around like race horse unless engine jumping around lol reving engine get instant response gauge definitely lot quicker digital tachs ive seen gauge isnt big size 2 means fit within small space unlike big 5 gauges highly recommended