This car really sucks. That's why it costs $1.3M

I'm disappointed to see no mention of the Chapparal 2J race car:

https://en.wikipedia.org/wiki/Chaparral_2J

The article says that the manufacturer of this new car ''has developed a patented fan system — dubbed Downforce-on-Demand — that sees two high-speed fans generate enormous suction beneath the car to effectively “suck” it onto the road, giving extra grip, similar to a vacuum cleaner.''

Is the Chapparal 2J prior art?