Stock car racing ||This article needs additional citations for
verification. (January 2009)| Sprint Cup Series drivers race at
Talladega Superspeedway in 2008 |Highest governing body||NASCAR|
Stock car racing is a form of automobile racing found mainly in
the United States, Canada, New Zealand, Great Britain, Mexico,
Brazil and Argentina. Traditionally, races are run on oval
tracks measuring approximately 0.25 to 2.66 miles (0.4 to 4.3
kilometers). NASCAR is the world's largest governing body for
stock car racing, and its Sprint Cup Series is the de facto
premier series of stock car racing. Top level races are 200 to
600 miles (322 to 966 km) in length. Average speeds in the top
classes are usually 70–80% of comparable levels of open wheel
racing at the same tracks. Some stock cars may reach speeds in
excess of 200 mph (322 km/h) at tracks such as Daytona
International Speedway and Talladega Superspeedway. These tracks
have come to be known as "restrictor plate tracks", a name that
is derived from the "restri