The 1984 Firecracker 400 was a NASCAR Winston Cup Series racing event that took place on July 4, 1984, at Daytona International Speedway in Daytona Beach, Florida. Richard Petty, driving the #43 Pontiac for Curb Racing, won the race. The victory gave Petty his 200th win in NASCAR Winston Cup Series competition, extending his longstanding record. It was also his final race victory before his 1992 retirement. The race was also notable for U.S. President Ronald Reagan's attendance. The race was held on a Wednesday. The next NASCAR race held on Wednesday would not happen again until 2020.