The new seat covers, which had been set out in the sun to warm up for easier installation, were laid out and the original listing wires were installed into the new covers. One front seatback cover in our kit was missing the listing wire sleeve. Dallas Mustang wouldn’t have caught this minor oversight by the manufacturer because the upholstery kits aren’t opened for inspection upon arrival. Since we were at an upholstery shop, the folks there simply placed the cover into the sewing machine and sewed on a listing sleeve in a few seconds. If you have damaged or missing listing wires, new ones can be made from wire coat hangers.