| 2024 World of Outlaws Sprint Car Series Muffler List | |||
| Date | Track Name | Location | Muffler Rule |
| February 7, 2024 | Volusia Speedway Park | Barberville, Florida | No Mufflers Required |
| February 8, 2024 | Volusia Speedway Park | Barberville, Florida | No Mufflers Required |
| February 9, 2024 | Volusia Speedway Park | Barberville, Florida | No Mufflers Required |
| February 10, 2024 | Volusia Speedway Park | Barberville, Florida | No Mufflers Required |
| March 3, 2024 | Volusia Speedway Park | Barberville, Florida | No Mufflers Required |
| March 4, 2024 | Volusia Speedway Park | Barberville, Florida | No Mufflers Required |
| March 8, 2024 | Kennedale Speedway Park | Kennedale, Texas | Required: WoO Muffler Rule |
| March 9, 2024 | Kennedale Speedway Park | Kennedale, Texas | Required: WoO Muffler Rule |
| March 15, 2024 | Cotton Bowl Speedway | Paige, Texas | No Mufflers Required |
| March 16, 2024 | Cotton Bowl Speedway | Paige, Texas | No Mufflers Required |
| March 22, 2024 | Big O Speedway | Ennis, Texas | No Mufflers Required |
| March 23, 2024 | Lawton Speedway | Lawton, Oklahoma | Required: WoO Muffler Rule |
| March 29, 2024 | Thunderbird Speedway | Muskogee, Oklahoma | No Mufflers Required |
| March 30, 2024 | 81 Speedway | Wichita, Kansas | No Mufflers Required |
| April 5, 2024 | US 36 Raceway | Osborn, Missouri | No Mufflers Required |
| April 6, 2024 | Arrowhead Speedway | Colcord, Oklahoma | No Mufflers Required |
| April 12, 2024 | Federated Auto Parts Raceway at I-55 | Pevely, Missouri | No Mufflers Required |
| April 13, 2024 | Federated Auto Parts Raceway at I-55 | Pevely, Missouri | No Mufflers Required |
| April 19, 2024 | Paducah International Raceway | Paducah, Kentucky | No Mufflers Required |
| April 20, 2024 | Tri-State Speedway | Haubstadt, Indiana | No Mufflers Required |
| April 26, 2024 | Knoxville Raceway | Knoxville, Iowa | Required: Must use Schoenfeld 14272735-78 |
| April 27, 2024 | Knoxville Raceway | Knoxville, Iowa | Required: Must use Schoenfeld 14272735-78 |
| May 1, 2024 | Jacksonville Speedway | Jacksonville, Illinois | No Mufflers Required |
| May 3, 2024 | Eldora Speedway | Rossburg, Ohio | No Mufflers Required |
| May 4, 2024 | Eldora Speedway | Rossburg, Ohio | No Mufflers Required |
| May 8, 2024 | Lincoln Speedway | Abbottstown, Pennsylvania | No Mufflers Required |
| May 10, 2024 | Williams Grove Speedway | Mechanicsburg, Pennsylvania | No Mufflers Required |
| May 11, 2024 | Williams Grove Speedway | Mechanicsburg, Pennsylvania | No Mufflers Required |
| May 17, 2024 | Attica Raceway Park | Attica, Ohio | Required: Must use Schoenfeld 14272735-78 |
| May 18, 2024 | Sharon Speedway | Hartford, Ohio | No Mufflers Required |
| May 24, 2024 | Atomic Speedway | Chillicothe, Ohio | No Mufflers Required |
| May 25, 2024 | Atomic Speedway | Chillicothe, Ohio | No Mufflers Required |
| May 27, 2024 | Fremont Speedway | Fremont, Ohio | No Mufflers Required |
| May 31, 2024 | Beaver Dam Raceway | Beaver Dam, Wisconsin | No Mufflers Required |
| June 1, 2024 | Beaver Dam Raceway | Beaver Dam, Wisconsin | No Mufflers Required |
| June 7, 2024 | River Cities Speedway | Grand Forks, North Dakota | No Mufflers Required |
| June 8, 2024 | Ogilvie Raceway | Ogilvie, Minnesota | No Mufflers Required |
| June 14, 2024 | Knoxville Raceway | Knoxville, Iowa | Required: Must use Schoenfeld 14272735-78 |
| June 14, 2024 | Knoxville Raceway | Knoxville, Iowa | Required: Must use Schoenfeld 14272735-78 |
| June 19, 2024 | Huset’s Speedway | Brandon, South Dakota | No Mufflers Required |
| June 20, 2024 | Huset’s Speedway | Brandon, South Dakota | No Mufflers Required |
| June 21, 2024 | Huset’s Speedway | Brandon, South Dakota | No Mufflers Required |
| June 22, 2024 | Huset’s Speedway | Brandon, South Dakota | No Mufflers Required |
| June 28, 2024 | Cedar Lake Speedway | New Richmond, Wisconsin | No Mufflers Required |
| June 29, 2024 | Cedar Lake Speedway | New Richmond, Wisconsin | No Mufflers Required |
| July 12, 2024 | Wilmot Raceway | Wilmot, Wisconsin | No Mufflers Required |
| July 13, 2024 | Wilmot Raceway | Wilmot, Wisconsin | No Mufflers Required |
| July 16, 2024 | Attica Raceway Park | Attica, Ohio | Required: Must use Schoenfeld 14272735-78 |
| July 19, 2024 | Eldora Speedway | Rossburg, Ohio | No Mufflers Required |
| July 20, 2024 | Eldora Speedway | Rossburg, Ohio | No Mufflers Required |
| July 24, 2024 | BAPS Motor Speedway | York Haven, Pennsylvania | No Mufflers Required |
| July 26, 2024 | Williams Grove Speedway | Mechanicsburg, Pennsylvania | No Mufflers Required |
| July 27, 2024 | Williams Grove Speedway | Mechanicsburg, Pennsylvania | No Mufflers Required |
| July 28, 2024 | Weedsport Speedway | Weedsport, New York | No Mufflers Required |
| August 2, 2024 | Federated Auto Parts Raceway at I-55 | Pevely, Missouri | No Mufflers Required |
| August 3, 2024 | Federated Auto Parts Raceway at I-55 | Pevely, Missouri | No Mufflers Required |
| August 7, 2024 | Knoxville Raceway | Knoxville, Iowa | Required: Must use Schoenfeld 14272735-78 |
| August 8, 2024 | Knoxville Raceway | Knoxville, Iowa | Required: Must use Schoenfeld 14272735-78 |
| August 9, 2024 | Knoxville Raceway | Knoxville, Iowa | Required: Must use Schoenfeld 14272735-78 |
| August 10, 2024 | Knoxville Raceway | Knoxville, Iowa | Required: Must use Schoenfeld 14272735-78 |
| August 16, 2024 | Jackson Motorplex | Jackson, Minnesota | No Mufflers Required |
| August 17, 2024 | Jackson Motorplex | Jackson, Minnesota | No Mufflers Required |
| August 23, 2024 | River Cities Speedway | Grand Forks, North Dakota | No Mufflers Required |
| August 24, 2024 | Red River Valley Speedway | West Fargo, North Dakota | No Mufflers Required |
| August 31, 2024 | Huset’s Speedway | Brandon, South Dakota | No Mufflers Required |
| September 1, 2024 | Huset’s Speedway | Brandon, South Dakota | No Mufflers Required |
| September 6, 2024 | Stockton Dirt Track | Stockton, California | Required: DBA Rule (Schoenfeld 14272735-78 is legal) |
| September 7, 2024 | Kings Speedway | Hanford, California | Required: DBA Rule (Schoenfeld 14272735-78 is legal) |
| September 13, 2024 | Bakersfield Speedway | Bakersfield, California | Required: DBA Rule (Schoenfeld 14272735-78 is legal) |
| September 14, 2024 | Merced Speedway | Merced, California | Required: DBA Rule (Schoenfeld 14272735-78 is legal) |
| September 20, 2024 | Thunderbowl Speedway | Tulare, California | Required: DBA Rule (Schoenfeld 14272735-78 is legal) |
| September 21, 2024 | Thunderbowl Speedway | Tulare, California | Required: DBA Rule (Schoenfeld 14272735-78 is legal) |
| September 27, 2024 | Wayne County Speedway | Orrville, Ohio | Required: WoO Muffler Rule |
| September 28, 2024 | Sharon Speedway | Hartford, Ohio | No Mufflers Required |
| October 4, 2024 | Williams Grove Speedway | Mechanicsburg, Pennsylvania | No Mufflers Required |
| October 5, 2024 | Williams Grove Speedway | Mechanicsburg, Pennsylvania | No Mufflers Required |
| October 11, 2024 | Selinsgrove Speedway | Selinsgrove, Pennsylvania | No Mufflers Required |
| October 12, 2024 | Selinsgrove Speedway | Selinsgrove, Pennsylvania | No Mufflers Required |
| October 18, 2024 | Dirt Oval 66 | Joliet, Illinois | No Mufflers Required |
| October 19, 2024 | Dirt Oval 66 | Joliet, Illinois | No Mufflers Required |
| October 25, 2024 | Riverside International Speedway | West Memphis, Arkansas | Required: WoO Muffler Rule |
| October 26, 2024 | Riverside International Speedway | West Memphis, Arkansas | Required: WoO Muffler Rule |
| November 6, 2024 | The Dirt Track at Charlotte | Concord, North Carolina | No Mufflers Required |
| November 7, 2024 | The Dirt Track at Charlotte | Concord, North Carolina | No Mufflers Required |
| November 8, 2024 | The Dirt Track at Charlotte | Concord, North Carolina | No Mufflers Required |
| November 9, 2024 | The Dirt Track at Charlotte | Concord, North Carolina | No Mufflers Required |
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