page_title: 1981 Mason-Dixon 500
hierarchical_section_title: 1981 Mason-Dixon 500
caption_attribution_description: Mapa do Dover International Speedway
context_page_description: The 1981 Mason-Dixon 500 was a NASCAR Winston Cup Series racing event that took place on May 17, 1981, at Dover Downs International Speedway in Dover, Delaware.
  During the preceding season, NASCAR had completely stopped tracking the year model of all the vehicles and most teams did not take stock cars to the track under their own power anymore. Only manual transmission vehicles were allowed to participate in this race; a policy that NASCAR has retained to the present day.
  The NASCAR Winston Cup Series was also plagued with top teams running big engines and finishing in third place to avoid inspection around the time that this race was held.
context_section_description: The 1981 Mason-Dixon 500 was a NASCAR Winston Cup Series racing event that took place on May 17, 1981, at Dover Downs International Speedway (now Dover International Speedway) in Dover, Delaware.
  During the preceding season, NASCAR had completely stopped tracking the year model of all the vehicles and most teams did not take stock cars to the track under their own power anymore. Only manual transmission vehicles were allowed to participate in this race; a policy that NASCAR has retained to the present day.
  The NASCAR Winston Cup Series was also plagued with top teams running big engines and finishing in third place to avoid inspection around the time that this race was held.
caption: Layout of Dover International Speedway
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