NASCAR announced their 2021 rules their package races.
The 750 horse power package races are Bristol (both oval and dirt), Charlotte Roval, Circuit of The Americas, Darlington, Daytona Road Course (Busch Clash), Dover, Indianapolis Road Course, New Hampshire, Martinsville, Nashville, Phoenix, Richmond, Road America, Sonoma Raceway and Watkins Glen.
The 550 horse power package races Atlanta, Charlotte, Auto Club, Homestead-Miami, Kansas, Las Vegas, Michigan, Pocono, and Texas.
The Speedway Package will be used at Daytona and Talladega.
The rules for 2021 for cup announced were Teams must compete in a minimum of 16 points events with a short block sealed engine. Teams are restricted to 150 hours Computational fluid dynamics runs per month.