The GRAND-AM Continental Tire Sports Car Challenge is GRAND-AM's showcase for the latest in international and American-made stock high performance sports cars, coupes and sedans. With major modifications permitted only to improve safety, the Sports Car Challenge is home to the same cars seen on streets and highways around the world every day. Contestants compete for both class honors and the overall victory. Series races are primarily run as the featured support events for the Rolex Sports Car Series presented by Crown Royal Cask No. 16.

Like the Rolex Series, the Continental Tire Sports Car Challenge is made up of two classes of race cars.  The big-bore Grand Sport (GS) class features a rules package that allows exotic international machines like the Porsche 996 and 997, Nissan 350Z, BMW M3 and others to go head-to-head with American iron such as the Camaro and Dodge Challenger. The smaller Street Tuner (ST) class is GRAND-AM's offering to the import and compact car crowd, with the Mazda RX-8 and Mazda MX-5, Chevrolet Cobalt SS, Dodge SRT4, Mini Cooper S, Acura TSX, a variety of BMWs and other models eligible. All Continental Sports Car Challenge classes run on Continental ExtremeContact tires.