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| 5/2/2021 | Granite City Motor Park - Sauk Rapids, MN Opening Night Races WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 5th | - | - | 10th |
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| 5/9/2021 | Granite City Motor Park - Sauk Rapids, MN Mother's Day Special with Micro Sprints Winged A-Class, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 5th | - | - | 8th |
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| 5/16/2021 | Granite City Motor Park - Sauk Rapids, MN Kid's Night - Bicycle Giveaway WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 5th | - | - | 10th |
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| 5/23/2021 | Granite City Motor Park - Sauk Rapids, MN Regular Night with MWM Special - WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 5th | - | - | 9th |
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| 6/12/2021 | Ogilvie Raceway - Ogilvie, MN Saturday Night Shootout WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 7th | - | - | 13th |
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| 7/11/2021 | Granite City Motor Park - Sauk Rapids, MN RV Mod Tour and Street Stock Tour A Modifieds, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 6th | - | - | 21st (DNF) |
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| 7/18/2021 | Granite City Motor Park - Sauk Rapids, MN Regular Night Races with Modified Special $2K to win WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 8th (DNF) | - | - | 7th (DNF) |
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| 8/29/2021 | Granite City Motor Park - Sauk Rapids, MN Structural Buildings WISSOTA Late Model Challenge Series WISSOTA Late Model: Wissota Late Model Challenge Series A Modifieds, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mark Rein (WISSOTA Street Stock) | 6th | - | - | 11th |
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