Continental Tire Sports Car Challenge

"Continental Tire Sports Car Challenge" cars are often purchased directly from the showroom floor with only minimal racing modifications allowed to enhance safety and performance. Two classes of race cars compete on the track at the same time during Continental Tire Sports Car Challenge—Street Tuner (ST) and Grand Sport (GS)—with drivers competing for top honors in their specified class, as well as the overall win. "Continental Tire Sports Car Challenge" cars are classified by weight, engine size and model. (Source: FOX Sports)