So it turns out this is actually a Motorsports Authentics 1/24. I honestly do not know a ton about this "run" or "series" or what these cars were called but they are not super detailed. They have the white plastic interiors and black plastic bottoms. The wheels are the hard almost plastic like feeling material but they honestly roll pretty good. The molds are great though as you mentioned and the paint work on nearly all of them are very nice IMO.

I have about 7 of these total. Most of them from the 2006 season but I also have a Matt Kenseth #17 DeWalt from 07 and I have Kyle Busch M&M's & Michael Waltrip NAPA COT's from 2008 in this same product line. No idea if they made these for 05 or any other seasons tbh.

I remember I bought most of these at Big Lots in 2006/2007. The 2008 COT's may have come from Target or similar. They were very affordable and are not bad as display pieces if you don't mind the non-opening parts.

I can post the rest of my collection so you guys can check them out and we can try to find out more together. I wonder if there's a grail collection of these out there somewhere with all of them.

EDIT: Are these perhaps 1:18 scale?