I installed the SuperSprings on my 2020 Navion and they seem to have stopped all the swaying. I had already installed SumoSprings. The SuperSprings raised the RV at the rear axle by about 3/4 of an inch. The SumoSprings are no longer almost fully compressed. The ride seems to be much better and drives more like a car now. I have not had it out on the Interstate yet.