Speedometer Calibrator | Gas | Multiple Makes & Models (Dodge/Jeep/Ram)

Rough Country's Speedometer Calibration Device puts the finishing touch on your lifted vehicle, quickly and easily reprogramming your speedometer to match the output of your larger tires.

Why You Need It: Your vehicle's computer tracks speed based on your stock tire height; upgrading to larger tires creates a discrepancy between your actual speed and the speedometer readout.

Plug and Play Installation: Connects directly to your vehicle's Diagnostic Link Connector Port — in just a few short minutes your speedometer reads true again. Updates your vehicle's ECM to ensure accurate shift points and proper electronic stability control.

Built-In Diagnostics: Reads and clears diagnostic codes to help manage "check engine light" and "service needed" messages, and includes a function to reset the speedometer back to stock prior to servicing.

Warranty: Includes a 1-Year Warranty.