Cars in the Grand Touring (GT) classes are mirror images of production-based cars that are found in auto showrooms around the world. They are modified, of course, to enhance performance and take the punishment of the most demanding road tracks in the world.

GT1 cars, the pinnacle of GT racing, features two-wheel drive race cars such as the Aston Martin DBR9, Corvette C6.R, Maserati MC12 and Saleen S7R. Possessing super car characteristics, these elite automobiles produce between 600-650 horsepower and have a minimum weight of 1,150 kilograms (approximately 2,535 pounds).

Cars in the GT2 class are more moderately modified, two-wheel drive race cars and are some of the most recognized sports cars in the world –Aston Martin Vantage GT2, BMW M3, Corvette C6.R, Dodge Viper Competition Coupe, Ferrari F430 GT, Ford GT-R, Panoz Esperante GTLM and Porsche 911 GT3 RSR. GT2 cars put out between 450-500 horsepower and have a minimum weight of 1,145 kilograms (2,480 pounds).