Well, the radiator support that goes all across the nose of the truck. Where that piece bolts to the frame cross member there are two bolts with rubber molded to them. The upper bolt piece is egg shaped so that you don't need to hold a wrench on them because they are not visible. I could slice some of the lower donuts from some body mounts and that would take up the space, I was just looking for some new ones that were maybe a little softer.