The GRAND-AM Grand Sport (GS) class includes popular sports and muscle cars, such as the BMW M3, Ford Mustang, Pontiac Firebird and GTO, Porsche 996 and Nissan 350Z. While the Super Touring (ST) class includes various small-to-mid-size, four door sedans and sports coupes, including the BMW Z4 and 328, Lexus IS300, Acura RSX, Mazda RX-8, Mini Cooper and Porsche Boxster.