I'm trying to find an air helper spring kit for the rear of my 2016 Durango RT AWD. The two I have found (Air Lift 60824 and Ride Rite 4184) do not fit the RT but will fit all other sub-models. The rep at Air Lift said the rear springs are a different size and they don't have the specs for them yet. I have found on the Dodge site that the RT springs are 22mm shorter but I don't know if that is the only difference. Can anyone provide the rear spring specs for the RT or has anyone installed a kit on a 2016 or close year?