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| 4/17/2021 | Miami County Raceway - Peru, IN Non-Wing Outlaw, Restricted 'A' Class, Winged A-Class, Junior Sprints, Sportsman Micros, Hybrid 600cc Micros, Senior Micros | Results | | Justin Harper (Hybrid 600cc Micros) | 7th (DNF) | - | - | - |
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| 4/24/2021 | Miami County Raceway - Peru, IN Non-Wing Outlaw, Restricted 'A' Class, Winged A-Class, Junior Sprints, Sportsman Micros, Hybrid 600cc Micros, Senior Micros | Rain Out |
| 5/1/2021 | Miami County Raceway - Peru, IN Non-Wing Outlaw, Restricted 'A' Class, Winged A-Class, Junior Sprints, Sportsman Micros, Hybrid 600cc Micros, Senior Micros | Results | | Justin Harper (Hybrid 600cc Micros) | 5th | - | - | 5th |
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| 5/8/2021 | Plymouth Speedway - Plymouth, IN HARF Night DIRTcar UMP Modifieds, Super Sports, Stock Non-Wing, Street Stocks | Results | | Justin Harper (Stock Non-Wing) | 2nd | - | - | 4th |
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| 5/15/2021 | Miami County Raceway - Peru, IN Winged Outlaw, Non-Wing Outlaw, Restricted 'A' Class, Winged A-Class, Junior Sprints, Sportsman Micros, Hybrid 600cc Micros | Results | | Justin Harper (Winged Outlaw) | 2nd | - | - | 4th | | Justin Harper (Hybrid 600cc Micros) | 4th | - | - | 17th |
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| 5/22/2021 | Miami County Raceway - Peru, IN $1000 Outlaw Non-Wing/$500 A-Class Non-Wing /Weekly Show (Outlaw Wing) Winged Outlaw, Restricted 'A' Class, Winged A-Class, Junior Sprints, Sportsman Micros, Hybrid 600cc Micros, Senior Micros | Results | | Justin Harper (Hybrid 600cc Micros) | 2nd | - | - | 7th |
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| 5/29/2021 | Miami County Raceway - Peru, IN PE3 Non-Wing World Championship Hybrid 600cc Micros | Results | | Justin Harper (Hybrid 600cc Micros) | 7th | - | - | - |
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| 6/19/2021 | Miami County Raceway - Peru, IN Winged Outlaw, Non-Wing Outlaw, Restricted 'A' Class, Winged A-Class, Junior Sprints, Sportsman Micros, Hybrid 600cc Micros, Senior Micros | Results | | Justin Harper (Hybrid 600cc Micros) | 4th | - | - | 6th |
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| 6/21/2021 | Miami County Raceway - Peru, IN Miami County Fair Night Winged Outlaw, Restricted 'A' Class, Winged A-Class, Junior Sprints, Sportsman Micros, Hybrid 600cc Micros, Senior Micros | Results | | Justin Harper (Hybrid 600cc Micros) | 8th | - | - | 7th |
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| 6/29/2021 | Miami County Raceway - Peru, IN Tom Danner Memorial Sponsored by Concept Chassis Non-Wing Outlaw, Restricted 'A' Class, Junior Sprints, Sportsman Micros, Hybrid 600cc Micros | Results | | Justin Harper (Non-Wing Outlaw) | 7th | - | 5th | - | | Justin Harper (Hybrid 600cc Micros) | 7th | - | 5th | - |
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| 6/30/2021 | Rush County Fairgrounds - Rushville, IN Race Clean Products Hoosier Dirt Cup Night #2 Non-Wing Outlaw | Results | | Justin Harper (Non-Wing Outlaw) | 2nd | - | - | 3rd |
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| 7/1/2021 | Plymouth Speedway - Plymouth, IN USAC Sprints 410 Sprints - Non-Winged: USAC National Sprint Cars Non-Wing Outlaw, Restricted 'A' Class | Results | | Justin Harper (Non-Wing Outlaw) | 1st | - | - | 21st |
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| 7/10/2021 | Miami County Raceway - Peru, IN Winged Outlaw, Non-Wing Outlaw, Restricted 'A' Class, Winged A-Class, Junior Sprints, Sportsman Micros, Hybrid 600cc Micros, Senior Micros | Results | | Justin Harper (Winged Outlaw) | - | - | - | - | | Justin Harper (Hybrid 600cc Micros) | 2nd | - | - | 17th (DNF) |
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| 7/22/2021 | Circle City Raceway - Indianapolis, IN Circle City Winged 410 Sprints, USAC Regional Midgets PLUS OUTLAW NON WINGED MICROS Midgets: USAC Indiana Midgets 410 Sprints - Winged, Non-Wing Outlaw | Results | | Justin Harper (Midgets) | - | - | - | - | | Justin Harper (Non-Wing Outlaw) | 6th | - | - | 14th |
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| 8/28/2021 | Miami County Raceway - Peru, IN 305 Sprints - Winged, Non-Wing Outlaw, Restricted 'A' Class, Winged A-Class, Junior Sprints, Sportsman Micros, Hybrid 600cc Micros, Senior Micros | Results | | Justin Harper (Hybrid 600cc Micros) | 1st | - | - | 7th |
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| 9/17/2021 | Miami County Raceway - Peru, IN Non-Wing Outlaw, Restricted 'A' Class, Restricted Non Winged Micros, Winged A-Class, Stock Non-Wing, Non-Winged Sprints, 125cc Winged Micros, 125cc Non Winged Micros, 270 Winged Micros | Results | | Justin Harper (Non-Wing Outlaw) | 6th | - | - | 14th | | Justin Harper (125cc Non Winged Micros) | 1st | - | - | 1st |
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| 9/25/2021 | Miami County Raceway - Peru, IN Non-Wing Outlaw, Restricted 'A' Class, Winged A-Class, Junior Sprints, Sportsman Micros, Hybrid 600cc Micros, Senior Micros | Results | | Justin Harper (Hybrid 600cc Micros) | 2nd | - | - | 4th |
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