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| 5/12/2018 | Rice Lake Speedway - Rice Lake, WI WISSOTA LateModels Spring appearance and Weekly event B Modifieds, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Pure Stock, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Chad Mahder (WISSOTA Late Model) | 2nd | - | - | 8th |
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| 8/17/2018 | Red Cedar Speedway - Menomonie, WI Mahder 55 - $5,555 to win WISSOTA Late Model Challenge Series WISSOTA Late Model: Wissota Late Model Challenge Series WISSOTA Midwest Mods, WISSOTA Modifieds | Results | | Chad Mahder (WISSOTA Late Model) | 9th (DNF) | - | - | 21st (DNF) |
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| 9/21/2018 | Red Cedar Speedway - Menomonie, WI Punky Manor Challenge Of Champions Night #2 Heats-Presented By: Bill's Distributing & Tim's Automot B Modifieds, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Super Stock | Results | | Chad Mahder (WISSOTA Late Model) | 2nd | - | - | 20th (DNF) |
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| 9/28/2018 | ABC Raceway - Ashland, WI 43rd Annual Red Clay Classic presented by Fastlane Motorsports and Tim's Automotive Machine B Modifieds, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Super Stock | Results | | Chad Mahder (WISSOTA Late Model) | 1st | - | - | 9th |
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| 10/6/2018 | Ogilvie Raceway - Ogilvie, MN Fall Classic (FYE) Hornets, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Chad Mahder (WISSOTA Late Model) | 4th | - | - | 23rd (DNF) |
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