The 1991 AC Delco 500 was the 27th stock car race of the 1991 NASCAR Winston Cup Series and the 27th iteration of the event.

[1][2][3][4] To fill out the top three, the aforementioned Harry Gant and Roush Racing driver Mark Martin would finish second and third, respectively.

[5] North Carolina Speedway was opened as a flat, one-mile oval on October 31, 1965.

In 1969, the track was extensively reconfigured to a high-banked, D-shaped oval just over one mile in length.

Kyle Petty, driving for SABCO Racing, would win the pole, setting a time of 24.496 and an average speed of 149.461 miles per hour (240.534 km/h) in the first round.