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| 4/27/2018 | Park Jefferson International Speedway - Jefferson, SD South Dakota Sprint Car Nationals 360 Sprints - Winged: Malvern Bank 360 Sprints with Midwest Sprint Touring Series, Nebraska 360 sprints 305 Sprints - Winged: IMCA RaceSaver Sprints Stock Cars, B Modifieds, Hornets | Results | | Paul Wenzlaff (Stock Cars) | 9th (DNF) | - | 3rd | 17th |
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| 5/5/2018 | Park Jefferson International Speedway - Jefferson, SD SLMR-Super Late Models plus IMCA Weekly Racing-Road to the Iron Cup IMCA Sport Mods Dirt Super Late Models: SLMR Late Model Series 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets | Results | | Paul Wenzlaff (Stock Cars) | 4th | - | - | 10th |
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| 5/26/2018 | Park Jefferson International Speedway - Jefferson, SD 360 Sprints - Winged: Malvern Bank 360 Sprints with Midwest Sprint Touring Series, Nebraska 360 sprints 305 Sprints - Winged: IMCA RaceSaver Sprints Stock Cars, A Modifieds, B Modifieds, Hornets | Results | | Paul Wenzlaff (Stock Cars) | 1st | - | - | 11th |
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| 6/2/2018 | Park Jefferson International Speedway - Jefferson, SD IMCA Weekly Racing-Road to the Iron Cup IMCA Hobby Stocks 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets | Results | | Paul Wenzlaff (Stock Cars) | 5th (DNF) | - | - | 8th |
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| 6/9/2018 | Park Jefferson International Speedway - Jefferson, SD IMCA Weekly Racing plus Neb Mod Lites (No IMCA Sprint Cars-Jackson Natl) Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets | Results | | Paul Wenzlaff (Stock Cars) | 3rd | - | - | 6th |
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| 6/30/2018 | Park Jefferson International Speedway - Jefferson, SD IMCA Weekly Racing plus LMSS and Road To Iron Cup Sport Modifieds sponsored by Turner Plumbing 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Hornets | Results | | Paul Wenzlaff (Stock Cars) | 3rd | - | - | 6th |
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| 7/14/2018 | Park Jefferson International Speedway - Jefferson, SD IMCA Weekly Racing Kids Night presented by Z98 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets | Results | | Paul Wenzlaff (Stock Cars) | 4th (DNF) | - | - | 10th |
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| 7/23/2018 | Park Jefferson International Speedway - Jefferson, SD Storm Solution Specialists present IMCA Dirt Knights Modified Tour Invades Park Jefferson Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets | Results | | Paul Wenzlaff (Stock Cars) | 2nd | - | - | 7th |
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| 7/28/2018 | Park Jefferson International Speedway - Jefferson, SD Fabulous $5 Night by Liberty National Bank-IMCA Weekly Racing-Road to Iron Cup IMCA Stock Cars 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets | Results | | Paul Wenzlaff (Stock Cars) | 3rd | - | - | 4th |
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| 8/11/2018 | Park Jefferson International Speedway - Jefferson, SD IMCA Weekly Racing Season Championship plus Nebraska Mod Lites (No IMCA Sprint Cars Knoxville Natl)) Modified Midgets, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets | Results | | Paul Wenzlaff (Stock Cars) | 3rd | - | - | 17th |
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| 9/14/2018 | Park Jefferson International Speedway - Jefferson, SD Opening Night-5th Annual Iron Cup presented by J&J Fitting 305 Sprints - Winged: IMCA RaceSaver Sprints Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets | Results | | Paul Wenzlaff (Stock Cars) | 3rd | - | - | 4th |
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| 9/15/2018 | Park Jefferson International Speedway - Jefferson, SD I State Truck Centers Championship Night-5th Annual Iron Cup presented by J&J Fitting 305 Sprints - Winged: IMCA RaceSaver Sprints Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets | Results | | Paul Wenzlaff (Stock Cars) | 8th (DNF) | - | - | DNS |
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