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| 4/2/2021 | Marshalltown Speedway - Marshalltown, IA 141 Speedway / Left Turn Lounge IMCA FrostBuster IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Joseph Luethje (IMCA Northern SportMod) | 10th (DNF) | - | 8th | - |
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| 4/3/2021 | Boone Speedway - Boone, IA IMCA Frostbuster IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Joseph Luethje (IMCA Northern SportMod) | 6th | - | 10th (DNF) | - |
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| 4/10/2021 | Boone Speedway - Boone, IA Season Opener IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Mod Lite | Results | | Joseph Luethje (IMCA Northern SportMod) | 2nd | - | - | 17th |
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| 4/16/2021 | Marshalltown Speedway - Marshalltown, IA Hoker Trucking East Super Late Models Series Kevin "Sharp Shooter" Miller Lite 30 Dirt Super Late Models: SLMR Late Model Series Dwarf, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Joseph Luethje (IMCA Northern SportMod) | 8th (DNF) | - | 8th | - |
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| 4/17/2021 | Boone Speedway - Boone, IA Saturday Night Series Weekly #2 IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Mod Lite | Results | | Joseph Luethje (IMCA Northern SportMod) | 10th (DNF) | - | 2nd | 20th (DNF) |
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| 4/23/2021 | Marshalltown Speedway - Marshalltown, IA Sleeping Angel's Foundation Fundraiser Night Dwarf, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Joseph Luethje (IMCA Northern SportMod) | 3rd | - | - | 9th |
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| 4/24/2021 | Boone Speedway - Boone, IA Saturday Night Series Weekly #3 IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Mod Lite | Results | | Joseph Luethje (IMCA Northern SportMod) | 7th | - | - | 15th |
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| 4/30/2021 | Marshalltown Speedway - Marshalltown, IA LOCAL UAW 893 Cliff Chambers Memorial Dwarf, Dirt Pro Trucks, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Joseph Luethje (IMCA Northern SportMod) | 4th | - | - | 10th |
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| 5/1/2021 | Boone Speedway - Boone, IA Hawkeye 100 World of Outlaws Late Models Dirt Super Late Models: World of Outlaws - Late Models A Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car | Results | | Joseph Luethje (IMCA Northern SportMod) | 7th | - | DNS | - |
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| 5/6/2021 | Marshalltown Speedway - Marshalltown, IA Dale DeFrance Memorial Thursday Night Thunder Dwarf, IMCA Late Models, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Joseph Luethje (IMCA Northern SportMod) | 6th (DNF) | - | - | 15th |
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| 5/14/2021 | Marshalltown Speedway - Marshalltown, IA Casey's Salute to Military / Haverhill Social Club Night Dwarf, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Joseph Luethje (IMCA Northern SportMod) | - | - | - | - |
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| 6/4/2021 | Marshalltown Speedway - Marshalltown, IA Old Timers Lounge Night Dwarf, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Joseph Luethje (IMCA Northern SportMod) | 5th | - | - | 16th |
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| 6/11/2021 | Marshalltown Speedway - Marshalltown, IA Casey's Salute to Marshalltown Firefighters, EMTs and First Responders Dwarf, IMCA Late Models, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Joseph Luethje (IMCA Northern SportMod) | 4th | - | - | 19th (DNF) |
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| 6/18/2021 | Marshalltown Speedway - Marshalltown, IA RBF Electric $400.00 to Win IMCA Hobby Stocks Dwarf, Dirt Pro Trucks, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, Sportsman Dwarf | Results | | Joseph Luethje (IMCA Northern SportMod) | 7th | - | 4th | 17th |
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| 7/2/2021 | Marshalltown Speedway - Marshalltown, IA Wolf Seeds Night Dwarf, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Joseph Luethje (IMCA Northern SportMod) | 3rd | - | - | 15th |
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| 7/16/2021 | Marshalltown Speedway - Marshalltown, IA Toby K's Hideaway $1,000.00 to Win IMCA Stock Cars Dwarf, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Joseph Luethje (IMCA Northern SportMod) | 2nd | - | - | 20th |
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| 7/23/2021 | Marshalltown Speedway - Marshalltown, IA Rumours Bar & Grille Casey's Salute to Marshalltown Police Dwarf, Dirt Pro Trucks, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Joseph Luethje (IMCA Northern SportMod) | 3rd | - | - | 17th (DNF) |
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| 7/30/2021 | Marshalltown Speedway - Marshalltown, IA Triple E Insulators Night Dwarf, IMCA Late Models, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Rain Out |
| 7/31/2021 | Boone Speedway - Boone, IA Salute to Veterans/Saturday Night Series Weekly #16 IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Mod Lite | Results | | Joseph Luethje (IMCA Northern SportMod) | 7th | - | 7th | - |
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| 8/6/2021 | Marshalltown Speedway - Marshalltown, IA Shawn's Custom Hay Grinding Night Dwarf, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Joseph Luethje (IMCA Northern SportMod) | 7th | - | - | 13th |
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| 8/7/2021 | Boone Speedway - Boone, IA Saturday Night Series Weekly #17 IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Mod Lite | Results | | Joseph Luethje (IMCA Northern SportMod) | 7th | - | - | 14th |
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| 8/13/2021 | Marshalltown Speedway - Marshalltown, IA BHE Night $1,000.00 to Win IMCA Norther SportMods Dwarf, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Joseph Luethje (IMCA Northern SportMod) | 4th | - | - | 17th |
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| 8/14/2021 | Boone Speedway - Boone, IA Saturday Night Series Weekly #18 IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact, IMCA Mod Lite | Results | | Joseph Luethje (IMCA Northern SportMod) | 3rd | - | - | 17th |
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| 8/20/2021 | Marshalltown Speedway - Marshalltown, IA Toby K's Hideaway Night Dwarf, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Joseph Luethje (IMCA Northern SportMod) | 3rd | - | - | 15th (DNF) |
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| 8/28/2021 | Boone Speedway - Boone, IA Season Championship IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Mod Lite | Results | | Joseph Luethje (IMCA Northern SportMod) | 9th | - | - | - |
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| 9/6/2021 | Boone Speedway - Boone, IA 2021 IMCA Speedway Motors Super Nationals Fueled by Casey’s IMCA Late Models, IMCA Northern SportMod, IMCA Hobby Stock | Results | | Joseph Luethje (IMCA Northern SportMod) | 5th | - | - | - |
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| 9/7/2021 | Boone Speedway - Boone, IA 2021 IMCA Speedway Motors Super Nationals Fueled by Casey’s Vintage Modifieds, Generic 1, IMCA Northern SportMod, IMCA Hobby Stock, IMCA Sport Compact | Results | | Joseph Luethje (IMCA Northern SportMod) | 9th (DNF) | - | - | - |
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| 9/17/2021 | Marshalltown Speedway - Marshalltown, IA 15th Annual World Nationals IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Joseph Luethje (IMCA Northern SportMod) | 3rd | - | - | 14th |
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| 9/18/2021 | Marshalltown Speedway - Marshalltown, IA 15th Annual World Nationals IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Joseph Luethje (IMCA Northern SportMod) | 3rd | - | - | 10th |
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| 10/8/2021 | Lee County Speedway - Donnellson, IA Casey's Harvest Hustle Night 1 Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Sport Compact | Results | | Joseph Luethje (B Modifieds) | 2nd | - | - | 20th |
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| 10/9/2021 | Lee County Speedway - Donnellson, IA Casey's Harvest Hustle Night 2 Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Sport Compact | Results | | Joseph Luethje (B Modifieds) | 4th | - | - | 14th |
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| 10/14/2021 | Dubuque Fairgrounds Speedway - Dubuque, IA Iowa Dirt Nationals Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, IMCA Late Models, IMCA Modified | Results | | Joseph Luethje (B Modifieds) | 6th | - | - | 21st |
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| 10/15/2021 | Dubuque Fairgrounds Speedway - Dubuque, IA Iowa Dirt Nationals Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Semi-Pro Legends, Sport Compact, IMCA Modified | Results | | Joseph Luethje (B Modifieds) | 5th | - | 9th | - |
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| 10/16/2021 | Dubuque Fairgrounds Speedway - Dubuque, IA Iowa Dirt Nationals Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, 600cc Modifieds, Sport Compact, IMCA Modified | Results | | Joseph Luethje (B Modifieds) | 10th | - | 10th | - |
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| 11/19/2021 | Central Arizona Raceway - Casa Grande, AZ 8th Annual Desert Thunder Nationals A Modifieds, Restricted 'A' Class, Winged A-Class, B Modifieds, IMCA Modified, IMCA Stock Car | Results | | Joseph Luethje (B Modifieds) | 8th (DNF) | - | 5th | 17th (DNF) |
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| 11/20/2021 | Central Arizona Raceway - Casa Grande, AZ 8th Annual Desert Thunder Nationals A Modifieds, Restricted 'A' Class, Winged A-Class, B Modifieds, IMCA Modified, IMCA Stock Car | Results | | Joseph Luethje (B Modifieds) | 3rd | - | - | 21st (DNF) |
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