They are Shelby based magnesium rim 13x6 made for the 1980-1981 dodge omni. They have two different center caps for the rim. If you do find a set make sure you use some temporary adhesive to keep them on. I lost 1 of my 4 and then found another in my collection of junk that was not the same! Unfortunately I do not have the rims anymore.
Michael
1980 TR8 FHC/Works Rally Project

If it is broken then fix it....if it is not then make it faster!"