Replace your Wranglers distorted and worn-out original rubber body mounts to maintain frame and tub alignment. Original rubber mounts are so soft they often crack, distort, and crush so badly they often fall off! And aluminum body mounts are too harsh for street use that they tend to break and cause other components to break. Energy's specially formulated polyurethane body mounts combine the best qualities of both as they are soft enough for a smooth ride, yet rugged enough for the most demanding street and off-road use. Most sets have a strong zinc plated steel ring molded into them for added durability and when the application requires it.