Usually, it's a bunch of mustangs and Subaru WRX pretending to be real
STI's with a lighter mix of Honduhs, old rx-7's and the occasional classic corolla or VW.
Typically, a good portion of the drivers are rookies.
Now, I'm not a great driver. Experienced though, I've had 11 years behind the wheels of racing carts .
Win or Loss ,the car's uniqueness will draw eyes and good advertising is priceless.
I haven't been to an event, I just have experience of talking to drivers competing and tuners preparing the cars. Some of them really professional machines for this purpose only.