Stock car racing
Stock car racing is a form of automobile racing found mainly and most prominently in the United States and Canada, with Australia, New Zealand, Mexico, Brazil and the United Kingdom also having forms of stock car auto racing. Traditionally, races are run on oval tracks measuring approximately . The world's largest governing body for stock car racing is the American NASCAR, and its NASCAR Cup Series is the premier top-level series of professional stock car racing. Top-level races typically range between in length. The cars were originally production models ("stock") but are now highly modified.