Stock cars are high-performance vehicles designed for racing, primarily in events like NASCAR. They are built to resemble standard production cars but are modified for speed, safety, and durability. These cars typically feature powerful engines, reinforced frames, and specialized tires to handle the demands of competitive racing. The term "stock" refers to the fact that these cars are based on mass-produced models, although they undergo significant modifications. Popular models include those from manufacturers like Ford, Chevrolet, and Toyota. Stock car racing is a popular motorsport in the United States, attracting large audiences and dedicated fans.