IMSA and HSR launch HSR Prototype Challenge for LMP3 cars
IMSA and IMSA-owned Historic Sportscar Racing (HSR) will launch a new six-event, endurance-format series for current and previous-generation (...)
![IMSA and HSR launch HSR Prototype Challenge for LMP3 cars](https://racer.com/wp-content/uploads/sites/85/2023/10/levitt-PLM-10-23-052058.jpg?#)
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