Fit 03 Dodge Ram 1500 RWD but it was a tight fit. It was also difficult to install, even when I completely lifted the truck off the ground on the hitch and let the tires sag. I still had to use a pry bar on a bottle jack to compress the shock enough to fit the bottom mount and it took a few tries. The impact is too strong to try to hand press (at least for me). When unloading, the rear end will definitely lift a couple of inches. It doesn't sag as much under load as it did before. The only downside, aside from the setup, is the harder ride, but then again, this is a truck.