{"id":842,"date":"2026-01-25T14:17:03","date_gmt":"2026-01-25T19:17:03","guid":{"rendered":"https:\/\/dirtcar.com\/rules\/?p=842"},"modified":"2026-01-25T14:17:03","modified_gmt":"2026-01-25T19:17:03","slug":"world-of-outlaws-sprint-cars-2026-muffler-requirements-january-25-2026","status":"publish","type":"post","link":"https:\/\/dirtcar.com\/rules\/2026\/01\/25\/world-of-outlaws-sprint-cars-2026-muffler-requirements-january-25-2026\/","title":{"rendered":"World of Outlaws Sprint Cars &#8211; 2026 Muffler Requirements &#8211; January 25, 2026"},"content":{"rendered":"<table width=\"836\">\n<tbody>\n<tr>\n<td colspan=\"3\" width=\"836\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <strong>\u00a0 \u00a02026 WoO SPRINT SERIES MUFFLER LIST\u00a0<\/strong><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Volusia Speedway Park<\/td>\n<td width=\"160\">Barberville, FL<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Talladega Short Track<\/td>\n<td width=\"160\">Eastaboga, AL<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Magnolia Motor Speedway<\/td>\n<td width=\"160\">Columbus, MS<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Kennedale Speedway Park<\/td>\n<td width=\"160\">Kennedale, TX<\/td>\n<td>Required: WoO Muffler Rule<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Lawton Speedway<\/td>\n<td width=\"160\">Lawton, OK<\/td>\n<td>Required: WoO Muffler Rule<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Creek County Speedway<\/td>\n<td width=\"160\">Sapulpa, OK<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">US 36 Raceway<\/td>\n<td>Osborn, MO<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">81 Speedway<\/td>\n<td width=\"160\">Park City, KS<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">I-55 Federated Auto Parts Raceway Park<\/td>\n<td width=\"160\">Pevely, MO<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Jacksonville Speedway<\/td>\n<td width=\"160\">Jacksonville, IA<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Tri-State Speedway<\/td>\n<td width=\"160\">Haubstadt, IN<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Knoxville Raceway<\/td>\n<td width=\"160\">Knoxville, IA<\/td>\n<td>Required: must use Schoenfeld 14272735-78<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Attica Raceway Park<\/td>\n<td width=\"160\">Attica, OH<\/td>\n<td>Required: must use Schoenfeld 14272735-78<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Sharon Speedway<\/td>\n<td width=\"160\">Hartford, OH<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Lincoln Speedway<\/td>\n<td width=\"160\">Abbottstown, PA<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Williams Grove Speedway<\/td>\n<td width=\"160\">Mechanicsburg, PA<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Eldora Speedway<\/td>\n<td width=\"160\">Rossburg, OH<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Knoxville Raceway<\/td>\n<td width=\"160\">Knoxville, IA<\/td>\n<td>Required: must use Schoenfeld 14272735-78<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Huset&#8217;s Speedway<\/td>\n<td width=\"160\">Brandon, SD<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">River Cities Speedway<\/td>\n<td width=\"160\">Grand Forks, ND<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Nodak Speedway<\/td>\n<td width=\"160\">Minot, ND<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Hartford Speedway<\/td>\n<td width=\"160\">Hartford, MI<\/td>\n<td>Required: WoO Muffler Rule<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Plymouth Dirt Track<\/td>\n<td width=\"160\">Plymouth, WI<\/td>\n<td>Required: WoO Muffler Rule<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Angell Park Speedway<\/td>\n<td width=\"160\">Sun Prairie, WI<\/td>\n<td>Required: WoO Muffler Rule<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Knoxville Raceway<\/td>\n<td width=\"160\">Knoxville, IA<\/td>\n<td>Required: must use Schoenfeld 14272735-78<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Huset&#8217;s Speedway<\/td>\n<td width=\"160\">Brandon, SD<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Cedar Lake Speedway<\/td>\n<td width=\"160\">New Richmond, WI<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Wilmot Raceway<\/td>\n<td width=\"160\">Wilmot, WI<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Attica Raceway Park<\/td>\n<td width=\"160\">Attica, OH<\/td>\n<td>Required: must use Schoenfeld 14272735-78<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Eldora Speedway<\/td>\n<td width=\"160\">Rossburg, OH<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Ohsweken Speedway<\/td>\n<td width=\"160\">Ohsweken, ON<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Weedsport Speedway<\/td>\n<td width=\"160\">Weedsport, NY<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">BAPS Motor Speedway<\/td>\n<td width=\"160\">York Haven, PA<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Williams Grove Speedway<\/td>\n<td width=\"160\">Mechanicsburg, PA<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">I-55 Federated Auto Parts Raceway Park<\/td>\n<td width=\"160\">Pevely, MO<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Knoxville Raceway<\/td>\n<td width=\"160\">Knoxville, IA<\/td>\n<td>Required: must use Schoenfeld 14272735-78<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Ogilvie Raceway<\/td>\n<td width=\"160\">Ogilvie, MN<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Jackson Motorplex<\/td>\n<td width=\"160\">Jackson, MN<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">River Cities Speedway<\/td>\n<td width=\"160\">Grand Forks, ND<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Red River Valley Speedway<\/td>\n<td width=\"160\">West Fargo, ND<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Huset&#8217;s Speedway<\/td>\n<td width=\"160\">Brandon, SD<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Belleville High Banks<\/td>\n<td width=\"160\">Belleville, KS<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Dodge City Raceway Park<\/td>\n<td width=\"160\">Dodge City, KS<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">El Paso County Raceway<\/td>\n<td width=\"160\">Calhan, CO<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Stockton Dirt Track<\/td>\n<td width=\"160\">Stockton, CA<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Bakersfield Speedway<\/td>\n<td width=\"160\">Bakersfield, CA<\/td>\n<td>Required:\u00a0 DBA RULE\u00a0 (Schoenfeld 14272735-78 is legal)<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Ventura Raceway<\/td>\n<td width=\"160\">Ventura, CA<\/td>\n<td>Required:\u00a0 DBA RULE\u00a0 (Schoenfeld 14272735-78 is legal)<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Williams Grove Speedway<\/td>\n<td width=\"160\">Mechanicsburg, PA<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Millstream Speedway<\/td>\n<td width=\"160\">Findlay, OH<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Mansfield Speedway<\/td>\n<td width=\"160\">Mansfield, OH<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Sharon Speedway<\/td>\n<td width=\"160\">Hartford, OH<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Lincoln Park Speedway<\/td>\n<td width=\"160\">Putnamville, IN<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">Texarkana 67 Speedway<\/td>\n<td width=\"160\">Texarkana, AR<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<tr>\n<td width=\"237\">The Dirt Track at Charlotte<\/td>\n<td width=\"160\">Concord, NC<\/td>\n<td>Mufflers not required<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&#8230;<\/p>\n","protected":false},"author":49,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-842","post","type-post","status-publish","format-standard","hentry","category-world-of-outlaws-sprint-cars","wpcat-6-id"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.3 (Yoast SEO v27.7) - 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