The Australian GT Championship is a CAMS-sanctioned national title for drivers of GT cars, held annually from 1960 to 1963, from 1982 to 1985 and from 2005. Each championship up to and including the 1963 title was contested over a single race and those after that year over a series of races. The categories which have contested the championship have not always been well defined and often have become a home for cars orphaned by category collapse or a sudden change in regulation.

The National Sports Sedans Series, formerly the Australian Sports Sedan Championship, is a Motorsport Australia-sanctioned national motor racing title for drivers of cars complying with Australian Sports Sedan regulations. This class, essentially a silhouette racing car class, permits three types of cars:Purpose-built steel spaceframe racing cars with bodywork resembling a production car sold in Australia Cars based on production street car bodies. Purpose-built race cars constructed for the American Trans-Am Series.