The one major change on the Bristol Motor Speedway schedule for 2019 involves the August race week. A second race for the NASCAR K&N Series replaces the NASCAR Whelen Modified Series as part of a Thursday doubleheader with the NASCAR Truck Series. While the Modifieds are popular with fans, particularly those in the Northeastern part of the country, the K&N Series makes more sense for Bristol Motor Speedway. The Modified Series, which is NASCAR's oldest division, had been a part of the BMS schedule since 2009.