Our Inline Speedometer Calibrator (PN 730133) is a simple plug-and-play solution to correct the speedometer in your Jeep Wrangler or Gladiator. It plugs into the speedometer cluster and allows you to correct for larger tires all the way up to 54" tall! Works on 2018+ JL Wranglers and 2020+ Gladiators. Note, this is not for vehicles equipped with the 12" display instrument cluster. That cluster has a different connector and PN 730133 will not work.
This videos details the full installation step-by-step. You can find more information at Hypertech.com including a full printable version of the instructions. Just search for your Year, Make, Model, and engine to find the details.