The Verizon IndyCar Series Road America Grand Prix takes center stage as an international lineup of drivers will have their chance to battle it out for glory on one of the world’s most majestic road courses. They will be joined by the Pirelli World Challenge featuring many of the world’s top sports cars and drivers in an all out wheel-to-wheel battle consisting of six classes headlined by separate GT and GTS races. The Porsche GT Cup class will run alongside the GT and GT-A class cars over the course of the weekend. The Pirelli World Challenge consists of seven classes offering a competitive slot for nearly every sports car and sports sedan available. Races are run in a timed, sprint format from start to finish and begin with the series’ trademark standing start. With door-to-door racing, no scheduled pit stops, driver changes and classes running together, it’s like watching the intensity of the final lap, every lap.