If your missing center caps and you dont want to pay stupid amounts of money on some you can go to lowes or home-depot and get this things called "knock-out" plugs, make sure theyre for electrical use and not plumbing they come in different sizes and run about a buck each. Theyre by the outlets and stuff. All you have to do is spray paint them or powder-coat them if you like, whatever color you want, let them cure, bend the tabs out and stick them in your rim and there you go you got yourself center caps for like 4 bucks. ill post up some pics when i get back in town this weekend