SPEEDOMETER CALIBRATOR ; 16-20 F150/ 17-21 SUPER DUTY
- Installs Easily To The Factory Wiring Harness
- Kit Includes USB Cable And Software CD
- Lower Limit - 50 Percent Of Stock Tire Size
- No Limitations For Increasing Tire Height
- No Wiring Or Soldering Required
- Adjustable Tire Size/ Gear Ratio Change
