2026 WoO SPRINT SERIES
MUFFLER LIST | ||
Volusia Speedway Park | Barberville, FL | Mufflers not required |
Talladega Short Track | Eastaboga, AL | Mufflers not required |
Magnolia Motor Speedway | Columbus, MS | Mufflers not required |
Kennedale Speedway Park | Kennedale, TX | Required: WoO Muffler Rule |
Lawton Speedway | Lawton, OK | Required: WoO Muffler Rule |
Creek County Speedway | Sapulpa, OK | Mufflers not required |
US 36 Raceway | Osborn, MO | Mufflers not required |
81 Speedway | Park City, KS | Mufflers not required |
I-55 Federated Auto Parts Raceway Park | Pevely, MO | Mufflers not required |
Jacksonville Speedway | Jacksonville, IA | Mufflers not required |
Tri-State Speedway | Haubstadt, IN | Mufflers not required |
Knoxville Raceway | Knoxville, IA | Required: must use Schoenfeld 14272735-78 |
Attica Raceway Park | Attica, OH | Required: must use Schoenfeld 14272735-78 |
Sharon Speedway | Hartford, OH | Mufflers not required |
Lincoln Speedway | Abbottstown, PA | Mufflers not required |
Williams Grove Speedway | Mechanicsburg, PA | Mufflers not required |
Eldora Speedway | Rossburg, OH | Mufflers not required |
Knoxville Raceway | Knoxville, IA | Required: must use Schoenfeld 14272735-78 |
Huset’s Speedway | Brandon, SD | Mufflers not required |
River Cities Speedway | Grand Forks, ND | Mufflers not required |
Nodak Speedway | Minot, ND | Mufflers not required |
Hartford Speedway | Hartford, MI | Required: WoO Muffler Rule |
Plymouth Dirt Track | Plymouth, WI | Required: WoO Muffler Rule |
Angell Park Speedway | Sun Prairie, WI | Required: WoO Muffler Rule |
Knoxville Raceway | Knoxville, IA | Required: must use Schoenfeld 14272735-78 |
Huset’s Speedway | Brandon, SD | Mufflers not required |
Cedar Lake Speedway | New Richmond, WI | Mufflers not required |
Wilmot Raceway | Wilmot, WI | Mufflers not required |
Attica Raceway Park | Attica, OH | Required: must use Schoenfeld 14272735-78 |
Eldora Speedway | Rossburg, OH | Mufflers not required |
Ohsweken Speedway | Ohsweken, ON | Mufflers not required |
Weedsport Speedway | Weedsport, NY | Mufflers not required |
BAPS Motor Speedway | York Haven, PA | Mufflers not required |
Williams Grove Speedway | Mechanicsburg, PA | Mufflers not required |
I-55 Federated Auto Parts Raceway Park | Pevely, MO | Mufflers not required |
Knoxville Raceway | Knoxville, IA | Required: must use Schoenfeld 14272735-78 |
Ogilvie Raceway | Ogilvie, MN | Mufflers not required |
Jackson Motorplex | Jackson, MN | Mufflers not required |
River Cities Speedway | Grand Forks, ND | Mufflers not required |
Red River Valley Speedway | West Fargo, ND | Mufflers not required |
Huset’s Speedway | Brandon, SD | Mufflers not required |
Belleville High Banks | Belleville, KS | Mufflers not required |
Dodge City Raceway Park | Dodge City, KS | Mufflers not required |
El Paso County Raceway | Calhan, CO | Mufflers not required |
Stockton Dirt Track | Stockton, CA | Mufflers not required |
Bakersfield Speedway | Bakersfield, CA | Required: DBA RULE (Schoenfeld 14272735-78 is legal) |
Ventura Raceway | Ventura, CA | Required: DBA RULE (Schoenfeld 14272735-78 is legal) |
Williams Grove Speedway | Mechanicsburg, PA | Mufflers not required |
Millstream Speedway | Findlay, OH | Mufflers not required |
Mansfield Speedway | Mansfield, OH | Mufflers not required |
Sharon Speedway | Hartford, OH | Mufflers not required |
Lincoln Park Speedway | Putnamville, IN | Mufflers not required |
Texarkana 67 Speedway | Texarkana, AR | Mufflers not required |
The Dirt Track at Charlotte | Concord, NC | Mufflers not required |