The 2019 Allied Steel Buildings 200 was a NASCAR Xfinity Series race held on May 4, 2019, at Dover International Speedway in Dover, Delaware. Contested over 200 laps on the 1-mile (1.6 km) concrete speedway, it was the 10th race of the 2019 NASCAR Xfinity Series season. This was the season's fourth and final Dash 4 Cash race.

Biagi-DenBeste Racing, originally Biagi Brothers Racing, was an American professional stock car racing team that last competed in the NASCAR Xfinity Series in partnership with Stewart-Haas Racing. The team was based in Mooresville, North Carolina.