The holes in the body were roughed in. They had to be enlarged and centered to the bumper and bumper mounts. You can see the slight shift to the left in the holes. The bumper itself sets the hole spacing. It is the "show piece" that is non-adjustable. I held the bumper in place and kept sanding out the holes until it fit. I then outlined around the bumper "tubes" for the grommets and enlarged the holes to exactly fit the grommets. These then served to center the holes in the black bumper mount bracket.