I looked into other solutions but this is the best answer to the common problem of the sagging factory door pads on this generation of Mustangs. Like others said, the door panels need to be taken off in order to work on them horizontally. Also, extra silicone will be needed. After the toughest part, which was removal of the existing material and glue, the inserts (with the silicone applied) seemed to snap into place. I had no problem with any silicone oozing out of the edges and no clamping was necessary. Great product!