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| 4/2/2021 | Hamilton County Speedway - Webster City, IA USMTS Spring Challenge A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars | Results | | Brian Mahlstedt (USRA B-Mods) | 4th | - | - | 11th |
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| 4/23/2021 | Fayette County Speedway - West Union, IA Weekly Points Race 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Brian Mahlstedt (USRA B-Mods) | 9th (DNF) | - | - | DNS |
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| 4/30/2021 | Fayette County Speedway - West Union, IA Weekly Points Race 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Brian Mahlstedt (USRA B-Mods) | 2nd | - | - | 4th |
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| 5/1/2021 | Deer Creek Speedway - Spring Valley, MN Points Race USRA B-Mods, USRA Modifieds, WISSOTA Midwest Mods, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Brian Mahlstedt (USRA B-Mods) | 5th | - | 2nd | 11th |
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| 5/7/2021 | Fayette County Speedway - West Union, IA Weekly Points Race ~ Tuner Special 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Brian Mahlstedt (USRA B-Mods) | 3rd | - | - | 10th |
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| 5/29/2021 | Deer Creek Speedway - Spring Valley, MN 18th Annual USMTS Southern MN Spring Challenge A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods, USRA Stock Cars, WISSOTA Midwest Mods | Results | | Brian Mahlstedt (USRA B-Mods) | 5th | - | 3rd | 15th |
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| 5/30/2021 | Winneshiek Raceway - Decorah, IA 13th Annual USMTS Nordic Nationals A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars | Results | | Brian Mahlstedt (USRA B-Mods) | 1st | - | - | 6th |
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| 6/4/2021 | Fayette County Speedway - West Union, IA Weekly Points Race - Sponsored by Pioneer & United Beverage 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Brian Mahlstedt (USRA B-Mods) | 5th | - | - | 6th |
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| 6/11/2021 | Fayette County Speedway - West Union, IA Weekly Points Race ~ Sponsored by Alpha Tap ~ $1000 to win BMods 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Brian Mahlstedt (USRA B-Mods) | 4th | - | - | 5th |
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| 6/18/2021 | Fayette County Speedway - West Union, IA Weekly Points Race 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Brian Mahlstedt (USRA B-Mods) | 1st | - | - | 8th |
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| 6/25/2021 | Fayette County Speedway - West Union, IA Hooker Trucking Super Late Model East Series Late Model Special Dirt Super Late Models: SLMR Late Model Series Dirt Late Models, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars | Results | | Brian Mahlstedt (USRA B-Mods) | 4th | - | - | 11th |
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| 7/2/2021 | Fayette County Speedway - West Union, IA Weekly Points Race ~ Sponsored by The Place in Protivin ~ $100 extra to each feature winner 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Brian Mahlstedt (USRA B-Mods) | 3rd | - | - | 2nd |
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| 7/10/2021 | Deer Creek Speedway - Spring Valley, MN Points Race USRA B-Mods, USRA Modifieds, WISSOTA Midwest Mods, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Brian Mahlstedt (USRA B-Mods) | 1st | - | - | 14th |
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| 7/16/2021 | Fayette County Speedway - West Union, IA Weekly Points Race ~ Sponsored by KAR Auto & No Limit Diesel 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Brian Mahlstedt (USRA B-Mods) | 4th | - | - | 8th |
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| 7/21/2021 | Fayette County Speedway - West Union, IA Fayette County Fair Race - Rage Chassis 40 USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, IMCA Modified | Results | | Brian Mahlstedt (USRA B-Mods) | 2nd | - | - | 3rd |
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| 7/23/2021 | Mississippi Thunder Speedway - Fountain City, WI Weekly Racing USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks | Results | | Brian Mahlstedt (USRA B-Mods) | 5th | - | - | 24th (DNF) |
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| 7/30/2021 | Mississippi Thunder Speedway - Fountain City, WI K-Town Klash USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks | Results | | Brian Mahlstedt (USRA B-Mods) | 4th | - | 3rd | 23rd (DNF) |
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| 8/6/2021 | Fayette County Speedway - West Union, IA Weekly Points Race ~ Iowa Donor Network Race 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Brian Mahlstedt (USRA B-Mods) | 5th | - | - | 19th (DNF) |
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| 8/13/2021 | Fayette County Speedway - West Union, IA Weekly Points Race ~ Sponsored by Chase Trucking ~ Hall of Fame - $1000 to win Hobby Stocks 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Brian Mahlstedt (USRA B-Mods) | 6th | - | - | 13th |
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| 8/20/2021 | Fayette County Speedway - West Union, IA 2021 Season Championship ~ Sponsored by Appliance Plus of West Union 600cc Modifieds, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Brian Mahlstedt (USRA B-Mods) | 5th | - | - | 14th |
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| 9/4/2021 | Deer Creek Speedway - Spring Valley, MN 16th Annual USMTS Labor Day Duel A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods, USRA Late Models, USRA Stock Cars | Results | | Brian Mahlstedt (USRA B-Mods) | 5th | - | 2nd | 26th (DNF) |
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| 9/5/2021 | Fayette County Speedway - West Union, IA USMTS A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars | Results | | Brian Mahlstedt (USRA B-Mods) | 3rd | - | - | 23rd |
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| 9/23/2021 | Deer Creek Speedway - Spring Valley, MN 23rd Annual Featherlite Fall Jamboree USRA B-Mods, USRA Modifieds | Results | | Brian Mahlstedt (USRA B-Mods) | 4th | - | 2nd | 13th |
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| 9/24/2021 | Deer Creek Speedway - Spring Valley, MN 23rd Annual Featherlite Fall Jamboree A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods | Results | | Brian Mahlstedt (USRA B-Mods) | 4th | - | 2nd | 24th |
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| 9/25/2021 | Deer Creek Speedway - Spring Valley, MN 23rd Annual Featherlite Fall Jamboree A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods | Results | | Brian Mahlstedt (USRA B-Mods) | 2nd | - | - | 21st |
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| 10/16/2021 | Mason City Motor Speedway - Mason City, IA Five Star Classic 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Brian Mahlstedt (USRA B-Mods) | 3rd | - | - | 4th |
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| 10/17/2021 | Mason City Motor Speedway - Mason City, IA Five Star Classic 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Brian Mahlstedt (USRA B-Mods) | 1st | - | - | 7th |
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