Divisions of Competition
 
MODIFIED

Modifieds, NASCAR's first sanctioned division, have been the featured division at Bowman Gray Stadium since racing began in 1949. At 2650 pounds minimum, the lightweight Modifieds are still the most powerful cars sanctioned by NASCAR. With their open-wheeled design, Modifieds bear no resemblance to today's stock cars. Completely engineered from the ground up with racing body, transmission, suspension, steering, braking, and engine components, the engine block is the only part that can be readily identified with a car manufacturer.

SPORTSMAN

The Sportsman Division includes selected American-made late model cars which must remain stock in appearance. Six-cylinder engines are permitted and may have certain modifications such as ported and polished heads and domed pistons. Unmodified eight-cylinder "crate motors" are permitted. Six-cylinder cars are given a 200 pound weight advantage. Safety modifications include roll cage, fuel cell, roof flap, driver compartment fire extinguisher, and NASCAR approved seat belts and driver seat.

STREET STOCK

The Street Stock Division is similar to the Sportsman Division, but with fewer engine modifications. Unlike the Sportsman Division, Street Stock cars may not have domed pistons or ported, polished, or otherwise modified heads. Street Stock cars have smaller carburetors and also weigh more than the Sportsman Division. Both in-line six-cylinder engines and eight-cylinder “crate motors” are allowed, although the eight-cylinder motors have a weight handicap. Safety modifications include roll cage, fuel cell, roof flap, driver compartment fire extinguisher, and NASCAR approved seat belts and driver seat.

STADIUM STOCK

The Stadium Stock Division is open to foreign and domestic cars and mini-trucks with stock bodies and four-cylinder engines. Only minor engine and chassis modifications are allowed. The minimum allowed weight is 1,800 pounds (without driver) with at least one pound for each cc (cubic centimeter of piston displacement). Safety modifications include roll cage, fuel cell, roof flap, driver compartment fire extinguisher, and NASCAR approved seat belts and driver seat.