Officials with the Great Lakes Super Sprints Presented by Engine Pro & ARP (GLSS) have announced more details for the 2025 Michigan CAT and Tour division schedules. Thunderbird Raceway in Muskegon, Michigan will make a return to the GLSS calendar for the first time since 2021 on Saturday, June 21st - marking the only stop in northern West Michigan for the 2025 season.
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