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| 3/6/2021 | 105 Motor Speedway - Cleveland, TX Restricted 'A' Class: POWRi Lonestar 600 Restrictor's Stock Non-Wing: NOW600 Non-Wing Micros with POWRi Lonestar 600's Non Wing Junior Sprints: POWRi Lonestar 600's Jr Sprint's 305 Sprints - Winged, Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | 5th | - | - | 4th |
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| 3/20/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Bandits, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | 1st | - | - | 4th |
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| 3/27/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, B Modifieds, Street Stocks, Bandits, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | 5th | - | - | 10th |
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| 4/10/2021 | Hunt County Raceway - Greenville, TX Weekly Show Stock Cars, Restricted 'A' Class, Winged A-Class, Super Stocks, USRA Limited Mods, USRA Factory Stocks, USRA Tuners | Results | | Curtis Twardeski (USRA Factory Stocks) | 2nd | - | - | 15th |
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| 4/17/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | 4th | - | - | 9th |
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| 4/24/2021 | I-37 Speedway - Pleasanton, TX I-37 Speedway Race Night Factory Stocks, Asphalt Mini Stocks, Restricted 'A' Class, Stock Non-Wing, Street Stocks, Economy Late Models, Limited Modified, IMCA Modified | Results | | Curtis Twardeski (Factory Stocks) | 7th | - | 5th | 13th |
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| 5/15/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Bandits, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | 6th | - | 2nd | 18th | | Curtis Twardeski (Street Stocks) | 3rd | - | - | 6th |
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| 5/29/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | 5th | - | - | 14th |
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| 5/31/2021 | Texana Raceway - Edna, TX Operation Honor the Fallen Factory Stocks, A Modifieds, B Modifieds, Street Stocks, Dirt Late Models, Dirt Cage Kart Junior 1, Flat Adult Clone, Limited Sport Mod, IMCA Mod Lite, Cage Jr. Predator, Cage Sr. Predator | Results | | Curtis Twardeski (Factory Stocks) | 5th | - | 7th | 21st |
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| 6/12/2021 | 105 Motor Speedway - Cleveland, TX Jesse McNorton Birthday Bash 305 Sprints - Winged, Factory Stocks, B Modifieds, Street Stocks, Bandits, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | 7th | - | 5th | - |
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| 6/19/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Dirt Pro Trucks, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | 3rd | - | - | 8th |
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| 6/26/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, Stock Non-Wing, B Modifieds, Street Stocks, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | 4th | - | - | 10th |
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| 7/10/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Bandits, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | 4th | - | - | 20th (DNF) |
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| 7/17/2021 | Cotton Bowl Speedway - Paige, TX Summer Showdown Series 1 - All Classes & DCRST Dwarf: Dwarf Car Racing Series of Texas Factory Stocks, Street Stocks, Sport Compact, IMCA Modified, IMCA Southern SportMod, IMCA Stock Car | Results | | Curtis Twardeski (Factory Stocks) | 4th | - | 1st | 12th |
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| 7/24/2021 | Cotton Bowl Speedway - Paige, TX Summer Showdown Series 2 - All Classes Factory Stocks, Street Stocks, Sport Compact, IMCA Modified, IMCA Southern SportMod, IMCA Stock Car | Results | | Curtis Twardeski (Factory Stocks) | 1st | - | - | 8th |
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| 8/13/2021 | Heart O' Texas Speedway - Waco, TX Factory Stocks, Street Stocks, 305 Sprints - Non-Winged, IMCA Modified, IMCA Southern SportMod, IMCA Stock Car | Results | | Curtis Twardeski (Factory Stocks) | 5th | - | - | 18th |
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| 8/14/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | 1st | - | - | DNS |
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| 8/21/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Bandits, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | 4th | - | - | 9th |
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| 9/25/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Bandits, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | 5th | - | - | 10th |
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| 10/8/2021 | Ark-La-Tex Speedway - Vivian, LA O'Reilly's Auto Parts Cajun Classic Factory Stocks, B Modifieds, Limited Modified | Results | | Curtis Twardeski (Factory Stocks) | 9th | - | - | - |
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| 10/9/2021 | Ark-La-Tex Speedway - Vivian, LA O'Reilly's Auto Parts Cajun Classic Factory Stocks, Limited Modified, Sport Compact | Results | | Curtis Twardeski (Factory Stocks) | - | - | - | 14th |
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| 10/22/2021 | Heart O' Texas Speedway - Waco, TX 24th Annual Fall Classic - 6th Annual Dwarf Car Nationals - Qualifying Night Factory Stocks, Street Stocks, Dirt Late Models, Limited Sport Mod, IMCA Modified, IMCA Southern SportMod, IMCA Stock Car, Veteran Dwarf, Pro Dwarf | Results | | Curtis Twardeski (Factory Stocks) | 3rd | - | - | - |
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| 10/23/2021 | Heart O' Texas Speedway - Waco, TX 24th Annual Fall Classic - 6th Annual Dwarf Car Nationals - Championship Night Factory Stocks, Street Stocks, Limited Sport Mod, IMCA Modified, IMCA Southern SportMod, IMCA Stock Car, Veteran Dwarf, Pro Dwarf | Results | | Curtis Twardeski (Factory Stocks) | - | - | 6th | 8th |
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| 10/29/2021 | 105 Motor Speedway - Cleveland, TX Halloween at the Hunert-N-5 Qualifying Night 305 Sprints - Winged, Factory Stocks, Restricted 'A' Class, Stock Non-Wing, B Modifieds, Street Stocks, Bandits, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | 4th | - | - | - |
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| 10/30/2021 | 105 Motor Speedway - Cleveland, TX Halloween at the Hunert-N-5 Feature Night 305 Sprints - Winged, Factory Stocks, Restricted 'A' Class, Stock Non-Wing, B Modifieds, Street Stocks, Bandits, Pure Stock | Results | | Curtis Twardeski (Factory Stocks) | - | - | 3rd | 5th |
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| 11/12/2021 | 105 Motor Speedway - Cleveland, TX The 26th Annual Renegade Race Fuel Texas Grand Factory Stocks, B Modifieds, Street Stocks, Bandits, Pure Stock, IMCA Modified | Results | | Curtis Twardeski (Factory Stocks) | 8th (DNF) | - | - | - |
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| 11/13/2021 | 105 Motor Speedway - Cleveland, TX The 26th Annual Renegade Race Fuel Texas Grand Factory Stocks, B Modifieds, Street Stocks, Bandits, Pure Stock, IMCA Modified | Results | | Curtis Twardeski (Factory Stocks) | - | - | 4th | 10th |
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