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| 5/1/2021 | Devils Lake Speedway - Crary, ND May Day Non-Winged Sprints, Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 4th | - | - | 7th |
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| 5/7/2021 | River Cities Speedway - Grand Forks, ND Season Opener - Premier Racing Series 410 Sprints - Winged: Northern Outlaw Sprint Association B Modifieds, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 4th | - | - | 9th |
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| 5/8/2021 | Devils Lake Speedway - Crary, ND Mothers Day Weekend Non-Winged Sprints, Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 3rd | - | - | 6th |
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| 5/14/2021 | River Cities Speedway - Grand Forks, ND AFCO Race of Champions B Modifieds, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 3rd | - | - | 12th |
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| 5/21/2021 | River Cities Speedway - Grand Forks, ND NOSA - KING OF THE WINGS Presented by BWW - Night 1 410 Sprints - Winged: Northern Outlaw Sprint Association Midgets: POWRi Lightning Sprints: POWRi Minn-Kota Lightning Sprints B Modifieds, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 3rd | - | - | 6th |
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| 5/22/2021 | Devils Lake Speedway - Crary, ND Non-Winged Sprints, Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 5th | - | - | 7th |
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| 5/28/2021 | River Cities Speedway - Grand Forks, ND Premier Racing Series with Northern Renegade Wingless Sprints 410 Sprints - Winged: Northern Outlaw Sprint Association B Modifieds, 305 Sprints - Non-Winged, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 4th | - | - | 4th |
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| 6/5/2021 | Greenbush Race Park - Greenbush, MN Midgets: POWRi Lightning Sprints: POWRi Minn-Kota Lightning Sprints Sport Compact, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Pure Stock, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 1st | - | - | 5th |
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| 6/11/2021 | River Cities Speedway - Grand Forks, ND Premier Racing Series 410 Sprints - Winged: Northern Outlaw Sprint Association B Modifieds, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 3rd | - | - | 5th |
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| 6/12/2021 | Greenbush Race Park - Greenbush, MN NLRA Special 600cc Modifieds, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Pure Stock, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 3rd | - | - | 11th |
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| 6/18/2021 | River Cities Speedway - Grand Forks, ND Big Al's Street Stock Tour & Premier Racing Series 410 Sprints - Winged: Northern Outlaw Sprint Association B Modifieds, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 6th | - | 7th | - |
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| 6/19/2021 | Devils Lake Speedway - Crary, ND Cliff Reeves Memorial/Steffes Street Stock Tour Midgets: POWRi Lightning Sprints: POWRi Minn-Kota Lightning Sprints Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 6th | - | 2nd | 11th |
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| 6/25/2021 | River Cities Speedway - Grand Forks, ND Greater Grand Forks Fair Night #1 410 Sprints - Winged, WISSOTA Midwest Mods, WISSOTA Street Stock | Rain Out |
| 6/26/2021 | Devils Lake Speedway - Crary, ND Walhalla Building Center Golden Hammer Late Model Challenge Non-Winged Sprints, Lightning Sprints, Pony Stock, Pure Stock, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 2nd | - | - | 2nd |
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| 7/2/2021 | River Cities Speedway - Grand Forks, ND Mid Season Track Championship 410 Sprints - Winged: Northern Outlaw Sprint Association B Modifieds, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 3rd | - | - | 14th |
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| 7/8/2021 | River Cities Speedway - Grand Forks, ND Wayne Anderson Cup Race #1 - NLRA Tour 410 Sprints - Winged: Northern Outlaw Sprint Association B Modifieds, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 5th | - | - | 10th |
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| 7/9/2021 | River Cities Speedway - Grand Forks, ND Wayne Anderson Cup Race #2 - Premier Racing Series/Celebrate Dirt! 410 Sprints - Winged: Northern Outlaw Sprint Association B Modifieds, 305 Sprints - Non-Winged, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 4th | - | - | 17th |
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| 7/24/2021 | Devils Lake Speedway - Crary, ND Ironhide Equipment Night Non-Winged Sprints, Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 1st | - | - | 8th |
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| 7/30/2021 | River Cities Speedway - Grand Forks, ND Premier Racing Series - Lighting Sprints/Wingless Sprints Midgets: POWRi Lightning Sprints: POWRi Minn-Kota Lightning Sprints 305 Sprints - Non-Winged, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 3rd | - | - | 4th |
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| 7/31/2021 | Devils Lake Speedway - Crary, ND Walhalla Building Center Golden Hammer MWM Challenge plus NLRA Special Pure Stock, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 5th | - | - | 7th (DNF) |
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| 8/13/2021 | River Cities Speedway - Grand Forks, ND Premier Racing Series - Lighting Sprint Special 410 Sprints - Winged: Northern Outlaw Sprint Association Midgets: POWRi Lightning Sprints: POWRi Minn-Kota Lightning Sprints WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 2nd | - | - | 2nd |
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| 8/14/2021 | Devils Lake Speedway - Crary, ND Bullies Construction night Non-Winged Sprints, Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 1st | - | - | 4th |
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| 8/21/2021 | Devils Lake Speedway - Crary, ND Bjorlie Construction night Non-Winged Sprints, Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 1st | - | - | 2nd |
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| 8/28/2021 | Devils Lake Speedway - Crary, ND Dietzler Electric Night Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 2nd | - | - | 6th |
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| 9/3/2021 | River Cities Speedway - Grand Forks, ND Season Track Championship 410 Sprints - Winged: Northern Outlaw Sprint Association 305 Sprints - Non-Winged, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 1st | - | - | 6th |
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| 9/4/2021 | Devils Lake Speedway - Crary, ND Brekke Aviation Night Track Championship Non-Winged Sprints, Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 3rd | - | - | 4th |
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| 9/5/2021 | Devils Lake Speedway - Crary, ND Points Championship plus Powder Puff and Mechanic Races Non-Winged Sprints, Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 1st | - | - | 6th |
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| 9/9/2021 | River Cities Speedway - Grand Forks, ND Prelude to the Johnny - NLRA Late Model Tour Championship B Modifieds, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 1st | - | - | 6th |
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| 9/10/2021 | River Cities Speedway - Grand Forks, ND John Seitz Memorial Night 1 & Wayne Anderson Cup Finale 410 Sprints - Winged: Northern Outlaw Sprint Association B Modifieds, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 3rd | - | - | 17th |
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| 10/2/2021 | Devils Lake Speedway - Crary, ND Fall Last Call Spooktacular Lightning Sprints, Pure Stock, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Seth Klostreich (WISSOTA Street Stock) | 2nd | - | - | 2nd |
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