Pontiac muscle and pony cars & vehicles were produced by the Pontiac division of General Motors from 1955 to 1981. These cars were based on the original "muscle car" concept of a light-weight, high-performance car that was affordable to the average American consumer. The most popular models included the Firebird, Trans Am, GTO, Grand Prix, and Bonneville. These vehicles featured powerful V8 engines ranging from 350 to 400 to 455 cubic inches, as well as performance enhancements such as high-performance brakes, suspension, tires, and transmissions. Most of these cars were equipped with reliable automatic transmissions, as well as high stall torque converters and heavy-duty internal components. In addition, these cars featured important safety features such as front and rear anti-roll bars, as well as padding and reinforcement bars on the steering column, dashboard and other areas. Ultimately, Pontiac muscle and pony cars & vehicles could be found both in the showroom as well as at the race track, making them popular choices for racing enthusiasts everywhere.