[OntarioVanMan]

I do believe it's called NASCAR???
NORTH American Stock Car Not that it matters much... Definition:

A stock car, in the original sense of the term, is an automobile that has not been modified from its original factory configuration. Later the term stock car came to mean any production-based automobile used in racing. This term was used to differentiate such a car from a race car, a special, custom-built car designed only for racing purposes with no intent of its ever being used as regular transportation.

When NASCAR was first formed by Bill France Sr. in 1948 to regulate stock car racing, there was a requirement that any car entered be made entirely of parts available to the general public through automobile dealers, and that all cars must be from a model run of which at least 500 cars of that model were sold to the general public.
Remembering it was a Jaguar that won in 1954...