Regional & National SCR

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.

USRRC - United States Road Racing Championship.

Trans-American Championship.

Canadian-American Challenge Cup

IMSA GT was a sports car racing series organized by International Motor Sports Association. Races took place primarily in the United States, and occasionally in Canada.

Deutsche Rennsport Meisterschaft