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| 8/14/2021 | Hibbing Raceway - Hibbing, MN Hall of Fame Night Vintage Modifieds: Northern Vintage Stockcar Racers Vintage Full Body Stock Cars, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Pure Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Keith Koski (WISSOTA Modifieds) | 4th | - | - | 7th (DNF) |
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| 8/21/2021 | Hibbing Raceway - Hibbing, MN Season Championship Night WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Pure Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Keith Koski (WISSOTA Modifieds) | 4th | - | - | 3rd |
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| 9/2/2021 | Proctor Speedway - Proctor, MN Structural Buildings WISSOTA Late Model Challenge Series WISSOTA Late Model: Wissota Late Model Challenge Series WISSOTA Modifieds | Results | | Keith Koski (WISSOTA Modifieds) | 9th (DNF) | - | 7th | - |
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| 9/4/2021 | Hibbing Raceway - Hibbing, MN Structural Buildings WISSOTA Late Model Challenge Series WISSOTA Late Model: Wissota Late Model Challenge Series WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Pure Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Keith Koski (WISSOTA Modifieds) | 5th | - | 3rd | 16th |
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| 9/5/2021 | Hibbing Raceway - Hibbing, MN Structural Buildings WISSOTA Late Model Challenge Series - Championship Night WISSOTA Late Model: Wissota Late Model Challenge Series WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Pure Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Keith Koski (WISSOTA Modifieds) | 8th | - | 9th | - |
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| 10/1/2021 | ABC Raceway - Ashland, WI Red Clay Classic A Modifieds, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Super Stock | Results | | Keith Koski (WISSOTA Modifieds) | - | - | - | - |
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