source: Audi Sport Appearance in Audi S1 EKS RX quattro at action sports event in the United States New rallycross competition with spectacular jumps Audi rallycross driver Mattias Ekström will take part in the Nitro World Games (September 22–23) in Salt Lake City for the first time. He will compete in the new rallycross event in an Audi S1 EKS RX quattro. Ekström will meet with top-class drivers from the rallycross series and popular U.S. action sports stars. The acti...