Q: What did this kit do for the older Model S?

It lowered a 2012-2020 Model S with factory air suspension by shifting each height setting down one step, so Standard became Low, Low became Very Low, and so on, while retaining all four OEM settings of Very High, High, Standard, and Low. The brackets were plug-and-play with about a 30-minute install, produced in 5000-series aluminum and anodized for corrosion resistance. It gave a lower center of gravity for better handling and cleaner looks.