Hey sorry I was not more specific with my inquiry. I have a 1947 Plymouth It has the oval holes for the tire valves. One of the previous owners (a long time ago judging by the tires) mounted tires that say "tubeless" on them but each tire has a tube in it . I am going to replace the tires and would like to go tubeless. Does anyone have a part number for either the one piece or the two piece valve that will work for my car? This is my first time on the forum and I am very impressed ! Thanks Dave Evans