Anyone who drives a Jeep, particularly a manual shift vehicle, knows the importance of knowing your RPMs. The Crown Automotive Tachometer replaces the factory gauge and looks identical to maintain the original look. The same gauge works on all 4,6 and 8-Cylinder engines, a switch on the back is available for you to select the correct application. Minor re-wring is needed, refer to the manufactures installation instructions to see the proper wiring configuration. This item is compatible for a number of Jeep models, including CJ-5s from 1976 to 1983 and CJ-7s from 1976 to 1986.