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Grand touring prototype (gtp)

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IMSA class guide

Series Guides - Sportscars

IMSA class guide

By RACER Staff - Aug 29, 2026, 4:41 PM ET

The IMSA WeatherTech SportsCar Championship currently runs four classes on track at once, split between two fundamentally different car types: purpose-built Prototypes and production-based GT cars. 

IMSA unveils 48-car full-season WeatherTech SportsCar Championship entry list for 2024

IMSA

IMSA unveils 48-car full-season WeatherTech SportsCar Championship entry list for 2024

By Richard S. James - Oct 12, 2023, 12:45 PM ET

The IMSA WeatherTech SportsCar Championship looks to roll into the 2024 season with its biggest fields yet. As IMSA President John Doonan promised earlier in the season when he announced the intent to have an entry list prior to Petit Le Mans, the approved list of entries for the complete...

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