IMSA Sportscar Endurance Challenge - 2025 Season 4

Just like its real-world counterpart, iRacing’s IMSA SportsCar Endurance Challenge allows you to get behind the wheel in both the LMP3 and GT4 classes for some more approachable multi-class road racing. In this series, though, you’ll race in extended events rather than just sprints! Races are held every other week starting in Week 1.