Well, we've got some of these:
Trans Am TA1; more power than a Cup car and basically the same as an SCCA GT-1 car
A whole swarm of these:
Trans Am TA2; less power, narrower bodywork and narrower tires than the above category, a lot of guys who want to make it into the top tiers of stock car racing compete in this series to gain experience with road racing
Later on we'll have some of these:
NASCAR Pinty's Series; this a Canadian series, the cars are built to a different rulebook compared to Xfinity or ARCA cars, the roofline in particular is different from the American cars, they don't race at any intermediates or superspeedways so they don't need to make the same considerations as the cars that run in the American lower categories need (no roof flaps for example because the sorts of crashes they help with don't happen on road courses or short tracks, just longer ovals)
And probably some of these as well:
NASCAR Cup Car; now no longer built around '60s era truck suspension; debuting this car is probably what first started making me interested in stock car racing because it's mechanically more like a modern road racing silhouette chassis than any lower category stock car (or any previous Cup car, for that matter)
_________________
When a clown moves into a palace, he doesn't become king, the palace becomes a circus.
"Many of us like to ask ourselves, What would I do if I was alive during slavery? Or the Jim Crow South? Or apartheid? What would I do if my country was committing genocide?' The answer is, you're doing it. Right now." —Former U.S. Airman (Air Force) Aaron Bushnell