I have no idea but this video was so much fun to watch. "battles" for position were actually physical confrontations between the cars. The interior shot is some dude in coveralls and a bicycle helmet about to do battle with no door bars at 150 mph. Every corner was done sideways burnout style. Dudes were flying off track, jumping their cars, and then getting back in the action.. no big deal.
Holy crap this is awesome stuff. There will be blood racecar style. Damn I want to go drive fast now lol