Rough Country 90009 Speedometer Calibrator

Put the finishing touch on your lifted vehicle w/Rough Country?s Speedometer Calibration Device! This easy-to-use Speedometer Calibrator uses helps you quickly & easily reprogram your vehicle?s speedometer to match the output of your larger tires. Your vehicle's computer is designed to track the speed based on your stock tire height. When upgrading to larger tires, there will be a discrepancy between your actual speed & the readout on your speedometer. This plug & play device connects directly to your vehicle?s DLC Port & in just a few short minutes your speedometer reads true again! This device can also easily read & check all diagnostic codes to help you manage ?check engine light? & ?service needed? messages, & also includes a function to reset the speedometer back to stock prior to servicing the vehicle. Includes a 1-Year Warranty.