on Tuesday delivered the 2020 rules to the teams and most of them remain largely unchanged. 

Below are noteworthy updates for 2020:

  • The current extended parts freeze will remain in place through 2020.
  • Each car number will be permitted to have a maximum of 12 certified chassis at any given time. In addition, each organization will be permitted to have a maximum of 10 unique chassis designs.
  • Teams must compete in a minimum of eight events with a long block sealed engine and at least eight with a short block sealed engine.
  • Each team will be allowed three roster spots regardless of number of vehicles in the organization. In addition, a maximum of 10 road crew personnel will be allowed on each roster.
  • Organizations will be permitted a total of 150 wind tunnel testing hours per calendar year.

The 2019 Cup Series saw the introduction of two primary aero packages on tracks greater than 1-mile in length. 

At tracks less than 1.33 miles in length, cars operated with 750 horsepower. Also, tapered spacers were introduced to replace the use of restrictor-plates at Daytona and Talladega.

The base package for all cars features a taller rear spoiler, a larger front splitter with 2-inch overhang and a wider radiator pan.


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