The 1990 Pepsi 400 was the 15th stock car race of the 1990 NASCAR Winston Cup Series season and the 32nd iteration of the event.

In a three-lap shootout to the finish, Richard Childress Racing driver Dale Earnhardt would manage to defend the field to complete a dominant performance throughout the race, leading 127 laps.

[1][2][3][4] To fill out the top three, owner-driver Alan Kulwicki and Hendrick Motorsports driver Ken Schrader would finish second and third, respectively.

The standard track at Daytona International Speedway is a four-turn superspeedway that is 2.5 miles (4.0 km) long.

Greg Sacks, driving for Hendrick Motorsports, would win the pole, setting a time of 46.028 and an average speed of 195.533 miles per hour (314.680 km/h) in the first round.