Newest Gen car has composite body, not CF, though a lot of parts like hood and deck lid may still be CF.
The transmission is now a transaxle and the wheels are aluminum 18” with a central lug. The Infinity series beta tested the bodies for the last few seasons and can take some banging around.
Thought it was a good show and less attrition than I thought a 1/4 mile flat track would provide. Since heat style races, no mid run pit stops planned and would have been crazy trying to turn into infield at speed!
Seems the transaxle was the demise of a few teams.
The pit stops should be in ten second range now with less lugs and need to index them. Not F1 speed but hey, not F1
Some Gen6 info
https://m.nascar.com/news-media/2021...up-series/amp/