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Red Bull keeping Hadjar on the sidelines for Madrid

Red Bull keeping Hadjar on the sidelines for Madrid

McLaughlin closes out IndyCar season on a high with crushing Laguna Seca win

McLaughlin closes out IndyCar season on a high with crushing Laguna Seca win

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Ferrari has missed its opportunity to shape F1 title fight – Hamilton

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D&R confirms Daly as its full-time IndyCar racer for 2027

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Dale Coyne Racing wins IndyCar’s final Leaders Circle contract

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.

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