What is a Late Model Stock Car?

Answer 1

A stock car, in the original sense of the term, described 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. Now a days stock cars are not stock, since no Ford Fusion that us common people can buy has a 700 HP engine. This term was used to differentiate such a car from a race car, a special, custom-built car designed only for racing purposes. The most popular cars seem to be the Chevrolet Monte Carlo and Chevrolet Impala. The cars have adopted larger spoilers so that the air passes smoothly over the car to provide a larger downforce over the back of the vehicle to prevent the car from flipping over. All cars have this spoiler.

* http://en.wikipedia.org/wiki/Stock_car_racing