Also, the Ford kit contains spacers for the power steering pump to get the correct belt tension with the smaller pulley and the correct supercharger oil. If I were doing the work myself I think the power steering spacers would be the hard part (you do have to remove the supercharger). No access and really requires a lift. The software has to be registered to your VIN and they throw in the OBD device to reprogram the ECU. In theory, with this, you can go back to the original tune. The tune update was buggy so I was glad to have CoolTech do it. Took a few tries. So, you have to provide the VIN when you order. The upgrade is on an SD card (think camera).