I wouldn't have expected you to know. It's one of those support series. They run, I think, on IMSA Weathertech GT weekends. The lower category has Ford Fiestas and Honda Fits and other such cars. Not so glamorous, but I think they've used Indy's road course.
"For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring." - Carl Sagan
