2019 NASCAR Rules Package and Usage Schedule

Aero Package

With its new aero package for 2019, NASCAR wants to increase drag and downforce while decreasing horsepower in its Cup cars at certain tracks. This comes after NASCAR had spent several years trying to decrease downforce, making the cars tougher to handle.

In theory, the cars in 2019 will be easier to drive on intermediate tracks with the new aero package, which has been described as similar to, but not exactly the same as, the package Cup cars ran in the 2018 All-Star Race. That event featured an unprecedented amount of drafting and pack racing at the 1.5-mile Charlotte Motor Speedway.

The new aero package that will be run in every Cup race in 2019 consists of the following:

  • Spoiler: 8" by 61".
  • Splitter: 2" overhang, 10.5" wings at ends of splitter (near tires).
  • Radiator pan: 37" in front tapered to 31" with vertical fences.
  • Aero ducts: Used at majority of oval tracks larger than 1 mile.

In addition, at tracks longer than 1.2 miles, the new aero package will include both air ducts and a smaller tapered spacer. Among those tracks, Atlanta, Pocono, Darlington and Homestead are exceptions; cars in those races will feature the smaller tapered spacer, but not the air ducts. The smaller tapered spacer (from 1.17 inches in diameter to 0.922 inches in diameter) will restrict more air flow and decrease horsepower from a target of 750 to a target of 550. The air ducts will increase drag and downforce.

2018 NASCAR Rules Package

Click images to view larger

2019 NASCAR Rules Package

Usage Schedule

2019 550HP and 750HP Usage Schedule
Race # Date Track Race Winner Make Horsepower Aero Ducts
1 02-2019 Daytona International Speedway Daytona 500 Denny Hamlin Toyota 550HP YES
2 02-2019 Atlanta Motor Speedway Folds of Honor QuikTrip 500 Brad Keselowski Ford 550HP NO
3 03-2019 Las Vegas Motor Speedway Pennzoil 400 presented by Jiffy Lube Joey Logano Ford 550HP YES
4 03-2019 ISM Raceway TicketGuardian 500 Kyle Busch Toyota 750HP NO
5 03-2019 Auto Club Speedway Auto Club 400 Kyle Busch Toyota 550HP YES
6 03-2019 Martinsville Speedway STP 500 Brad Keselowski Ford 750HP NO
7 03-2019 Texas Motor Speedway O'Reilly Auto Parts 500 Denny Hamlin Toyota 550HP YES
8 04-2019 Bristol Motor Speedway Food City 500 Kyle Busch Toyota 750HP NO
9 04-2019 Richmond Raceway Toyota Owners 400 Martin Truex Jr Toyota 750HP NO
10 04-2019 Talladega Superspeedway GEICO 500 Chase Elliott Chevrolet 550HP YES
11 05-2019 Dover International Speedway Gander RV 400 Martin Truex Jr Toyota 750HP NO
12 05-2019 Kansas Speedway Digital Ally 400 Brad Keselowski Ford 550HP YES
0 05-2019 Charlotte Motor Speedway Monster Energy NASCAR All-Star Race Kyle Larson Chevrolet 550HP YES
0 05-2019 Charlotte Motor Speedway Monster Energy Open Kyle Larson Chevrolet 550HP YES
13 05-2019 Charlotte Motor Speedway Coca-Cola 600 Martin Truex Jr Toyota 550HP YES
14 06-2019 Pocono Raceway Pocono 400 Kyle Busch Toyota 550HP YES
15 06-2019 Michigan International Speedway FireKeepers Casino 400 Joey Logano Ford 550HP YES
16 06-2019 Sonoma Raceway Toyota / Save Mart 350 Martin Truex Jr Toyota 750HP NO
17 06-2019 Chicagoland Speedway Camping World 400 Alex Bowman Chevrolet 550HP YES
18 07-2019 Daytona International Speedway Coke Zero Sugar 400 Justin Haley Chevrolet 550HP YES
19 07-2019 Kentucky Speedway Quaker State 400 Kurt Busch Chevrolet 550HP YES
20 07-2019 New Hampshire Motor Speedway Foxwoods Resort Casino 301 Kevin Harvick Ford 750HP NO
21 07-2019 Pocono Raceway Gander Outdoors 400 Denny Hamlin Toyota 550HP YES
22 08-2019 Watkins Glen International GoBowling at The Glen Chase Elliott Chevrolet 750HP NO
23 08-2019 Michigan International Speedway Consumers Energy 400 Kevin Harvick Ford 550HP YES
24 08-2019 Bristol Motor Speedway Bass Pro Shops NRA Night Race Denny Hamlin Toyota 750HP NO
25 09-2019 Darlington Raceway Bojangles' Southern 500 Erik Jones Toyota 550HP YES
26 09-2019 Indianapolis Motor Speedway Big Machine Vodka 400 at the Brickyard Kevin Harvick Ford 550HP YES
27 09-2019 Las Vegas Motor Speedway South Point 400 Martin Truex Jr Toyota 550HP YES
28 09-2019 Richmond Raceway Federated Auto Parts 400 Martin Truex Jr Toyota 750HP NO
29 09-2019 Charlotte Motor Speedway Road Course Bank of America Roval 400 Chase Elliott Chevrolet 550HP YES
30 10-2019 Dover International Speedway Drydene 400 Kyle Larson Chevrolet 750HP NO
31 10-2019 Talladega Superspeedway 1000Bulbs.com 500 Ryan Blaney Ford 550HP YES
32 10-2019 Kansas Speedway Hollywood Casino 400 Denny Hamlin Toyota 550HP YES
33 10-2019 Martinsville Speedway First Data 500 Martin Truex Jr Toyota 750HP NO
34 11-2019 Texas Motor Speedway AAA Texas 500 Kevin Harvick Ford 550HP YES
35 11-2019 ISM Raceway Bluegreen Vacations 500 Denny Hamlin Toyota 750HP NO
36 11-2019 Homestead Miami Speedway Ford EcoBoost 400 Kyle Busch Toyota 550HP YES

Engine, Chassis and Testing

  • 750 HP: 1.17" tapered spacer (Used at short tracks and road courses).
  • 550 HP: 0.922" tapered spacer (Used at oval tracks larger than 1 mile).
  • Enhanced vehicle chassismandatory at all tracks (previously announced).
  • Adding 3 long block engine seals in points races. These are in addition to the 13 short block seals introduced this season.
  • 25% reduction in testing (3 organizational tests, down from 4; 3 teams at each Goodyear test, down from 4).

Post-Race Inspection Penalties