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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 | | Nathan Renfro (Pure Stock) | 1st | - | - | 12th |
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| 3/13/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Stock Non-Wing, B Modifieds, Street Stocks, Bandits, Pure Stock | Results | | Nathan Renfro (Pure Stock) | 1st | - | - | 1st |
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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 | | Nathan Renfro (Pure Stock) | 1st | - | - | 3rd |
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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 | | Nathan Renfro (Pure Stock) | 1st | - | - | 1st |
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| 4/3/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Pure Stock | Results | | Nathan Renfro (Pure Stock) | 1st | - | - | 21st |
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| 4/10/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Pure Stock | Results | | Nathan Renfro (Pure Stock) | 4th | - | - | 1st |
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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 | | Nathan Renfro (Pure Stock) | 2nd | - | - | 1st |
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| 4/24/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Stock Non-Wing, B Modifieds, Street Stocks, Bandits, Pure Stock | Results | | Nathan Renfro (Pure Stock) | 4th | - | - | 3rd |
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| 5/8/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Pure Stock, IMCA Modified | Results | | Nathan Renfro (Pure Stock) | 7th (DNF) | - | - | 3rd |
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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 | | Nathan Renfro (Pure Stock) | 2nd | - | - | 5th |
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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 | | Nathan Renfro (Factory Stocks) | - | - | - | - | | Nathan Renfro (Pure Stock) | 3rd | - | - | 3rd |
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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 | | Nathan Renfro (Factory Stocks) | 2nd | - | - | 10th | | Nathan Renfro (Pure Stock) | 1st | - | - | 9th |
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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 | | Nathan Renfro (Pure Stock) | 2nd | - | - | 18th |
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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 | | Nathan Renfro (Pure Stock) | 2nd | - | - | 12th (DNF) |
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| 7/3/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Bandits, Pure Stock | Results | | Nathan Renfro (Pure Stock) | 1st | - | - | 1st |
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| 7/10/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Bandits, Pure Stock | Results | | Nathan Renfro (Pure Stock) | 1st | - | - | 10th (DNF) |
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| 7/17/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Pure Stock, IMCA Modified | Results | | Nathan Renfro (Pure Stock) | 5th | - | - | 16th |
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| 7/24/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, Stock Non-Wing, B Modifieds, Street Stocks, Pure Stock | Results | | Nathan Renfro (Pure Stock) | 4th | - | - | 1st |
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| 7/31/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, B Modifieds, Street Stocks, Bandits, Pure Stock, IMCA Modified | Results | | Nathan Renfro (Pure Stock) | 1st | - | - | 15th |
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| 8/7/2021 | 105 Motor Speedway - Cleveland, TX Stock Non-Wing: NOW600 Non-Wing Micros 305 Sprints - Winged, Factory Stocks, Restricted 'A' Class, Junior Sprints, Pure Stock | Results | | Nathan Renfro (Pure Stock) | 2nd | - | - | 12th (DNF) |
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| 8/14/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Pure Stock | Results | | Nathan Renfro (Pure Stock) | 1st | - | - | 1st |
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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 | | Nathan Renfro (Pure Stock) | 1st | - | - | 1st |
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| 9/4/2021 | 105 Motor Speedway - Cleveland, TX Stock Non-Wing: NOW600 Non-Wing Micros Factory Stocks, Restricted 'A' Class, B Modifieds, Junior Sprints, Pure Stock, IMCA Modified | Results | | Nathan Renfro (Pure Stock) | 5th | - | - | 5th |
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| 9/11/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series 305 Sprints - Winged, Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Bandits, Pure Stock | Results | | Nathan Renfro (Pure Stock) | 1st | - | - | 15th |
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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 | | Nathan Renfro (Pure Stock) | 1st | - | - | 2nd |
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| 10/9/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, B Modifieds, Street Stocks, Bandits, Dirt Pro Trucks, Pure Stock | Results | | Nathan Renfro (Pure Stock) | 1st | - | - | 3rd |
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| 10/16/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Pure Stock, IMCA Modified | Results | | Nathan Renfro (Pure Stock) | 1st | - | - | 7th |
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| 10/23/2021 | 105 Motor Speedway - Cleveland, TX Weekly Racing Series Factory Stocks, Sportsmans, B Modifieds, Street Stocks, Pure Stock | Results | | Nathan Renfro (Pure Stock) | 4th | - | - | 6th |
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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 | | Nathan Renfro (Pure Stock) | 1st | - | - | - |
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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 | | Nathan Renfro (Pure Stock) | - | - | - | 1st |
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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 | | Nathan Renfro (Pure Stock) | 1st | - | - | - |
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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 | | Nathan Renfro (Pure Stock) | - | - | - | 21st |
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