This product/service is designed for customers who are changing from the 4inch cluster to the larger 8inch cluster and will need a full programming and update of the cluster to get the most out of it. We will program the cluster specifically for your vehicles requirements. The cluster will undergo a firmware update to the 2016 specification, then the correct calibrations for your vehicle get loaded like Adaptive cruise, halgon or AFL headlights, TPMS settings and so on. The VIN then gets corrected to the correct vin of your vehicle allowing the mileage to be displayed. When you receive the item back its then fully plug and play