The first set is from one of the Revell or AMT tuner cars. Possibly an Eclipse, possibly an Integra (I don't remember. I just found the sprue with them on it in my parts box)
The second set isn't from a kit. They're resin 19" BBS Le Mans with aluminum sleeves from Scale Productions. They cost me a little over $25, which is more than I paid for the kit, but they are really nice, and the fine detail is really amazing. Either wheel I decide to go with, I will paint them gunmetal.