Additional Rules for Specially Marked Races

4 Lanes: The Four-Wide Nationals in both Las Vegas and Charlotte in the spring will compete with cars on four lanes.

• All cars will qualify on each lane as all four lanes will be used in qualifying.
• Three rounds with cars using all four lanes.
• In Rounds One and Two, the top two drivers (of four) will advance to the next round.
• The pairings are set as follows:
  • Race One: 1, 8, 9, 16
  • Race Two: 4, 5, 12, 13
  • Race Three: 2, 7, 10, 15
  • Race Four: 3, 6, 11, 14
  • Semifinal One: Top two in Race One and Race Two
  • Semifinal Two: Top two in Race Three and Race Four
  • Finals: Top two in Semifinal One and Semifinal Two
• Lane choice determined by times in previous round. In first round, lane choice determined by fastest times.
• Drivers who advance in Rounds One and Two will receive 20 points for each round advancement.
• In Round Three, the winner of the race will be declared the race winner and will collect 40 points. The runner-up will receive 20 points. Third and fourth place drivers will be credited as semifinal losers.

1.5: The U. S. Nationals and Auto Club Finals will have their race points increased by 50% . Drivers who qualify but are eliminated in the first round receive 30 points, and each round win is worth 30 points. The top four receive 10, 9, 8, and 7 points, respectively, for qualifying positions, with the 5–6 drivers receiving 6 points, 7–8 drivers receiving 5 points, 9–12 receiving 4 points, and 13–16 receiving 3 points. Also, the top four, not three, drivers after each session receive points for fastest times in each round (4-3-2-1).

MM: Pro Stock Car at this event is a non-championship race with the Mountain Motor formula.

Event changes

The race events in Topeka, Kansas and Petersburg, Virginia have switched dates for this year, with the Virginia NHRA Nationals taking place in May and the Menards NHRA Heartland Nationals in June.^[1] In the Countdown, the race events in Charlotte, North Carolina and Ennis, Texas have switched weekends for this year in October.^[1] All other events during this season remain on the same schedule, although a couple of them either moved up or down a weekend. Scheduling changes made primarily to avoid NASCAR events in the markets.

NHRA Pro Stock Car only raced in 18 events this year, down from 24 events the year prior. Four of the races that they did not participate in featured non-championship exhibition Mountain Motor Pro Stock Cars (over-500 ci engines with carburetors). Those races are Houston, Charlotte 1, Bristol and Epping.^[6]