My 2015 F-250 was my introduction to the RAS product. When we bought the 5th wheel we added a leaf to the rear springs and, while the rig sat nice and level there was some porpoising on the highway. I thought about adding stronger rear shocks but also knew they would change the ride when not towing. That's when I decided to give RAS a try. I could not be more thankful for that!. Unless you've experienced it, you wouldn't believe it. But, best of all, not only was proposing gone but the truck rode and handled better when empty!!  -Ed Foss