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| 7/3/2021 | Adams County Speedway - Corning, IA NASCAR ADVANCE AUTO PARTS WEEKLY SERIES Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact | Results | | Zach Marxen (B Modifieds) | 7th | - | - | DNS |
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| 8/7/2021 | Adams County Speedway - Corning, IA PPI NIGHT+ Kids BOX CAR RACES- Compact Shootout Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact | Results | | Zach Marxen (B Modifieds) | 8th | - | - | 19th |
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| 8/14/2021 | Adams County Speedway - Corning, IA McCunn Specialty Firearms Presents -Stock Car Shootouts + NAAPWS Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact | Results | | Zach Marxen (B Modifieds) | 5th | - | - | 21st |
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| 8/21/2021 | Adams County Speedway - Corning, IA Custom Diesel Drivers Training Presents "Salute to Truckers Night" Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact | Results | | Zach Marxen (B Modifieds) | 8th | - | - | DNS |
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