Speedometer Calibrator Inline Ford F-250/F-350 Super Duty 4WD (2011-2016) Rough Country Drivetrain & Differentials - Transmission Electronics - Transmission Control Module This ensures accurate spark delivery

This ensures accurate spark delivery and far less chance of spark scatter inside the cap

Whether you're navigating dusty trails or keeping cool on hot days

one for top end overrev protection and another to use during the burnout to achieve consistent tire temperatures

making installation fast and simple

Speedometer Calibrator Inline Ford F-250/F-350 Super Duty 4WD (2011-2016) Rough Country Drivetrain & Differentials - Transmission Electronics - Transmission Control Module This ensures accurate spark deliveryPut the finishing touch on your lifted vehicle with Rough Country's Speedometer Calibration Device! This easy to use Speedometer Calibrator helps you quickly and 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 and the readout on your