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From the late 1990s until 2013, top-level sports car racing in North America was split between the high-tech American Le Mans Series and the low-cost Rolex Sports Car Series. These two series were merged in 2014 to form the United SportsCar Championship, [1] which was subsequently renamed as the IMSA SportsCar Championship in 2016.
The class was originally introduced in 2021 as a means of bolstering the overall grid size, which had seen a record-low 38 starting cars in the 2020 24 Hours of Daytona. IMSA cited the growth of the GTP class as a contributing factor to dropping LMP3 for 2024 onwards, in addition to growth in other classes. [1] GTP is the flagship class of the ...
The International Motor Sports Association (IMSA) is a North American sports car racing sanctioning body based in Daytona Beach, Florida, under the jurisdiction of the ACCUS arm of the FIA. It was started by John Bishop, a former executive director of SCCA (Sports Car Club of America), and his wife Peggy in 1969 with help from Bill France Sr ...
The 2025 IMSA SportsCar Championship (known for sponsorship reasons as the 2025 IMSA WeatherTech SportsCar Championship) is an ongoing motor racing championship and the 55th racing season sanctioned by the International Motor Sports Association, which traces its lineage back to the 1971 IMSA GT Championship.
The Porsche 963 (pictured at the 2022 Goodwood Festival of Speed) is one of the prototype race cars that are allowed to compete under IMSA’s new GTP class. It complies with the LMDh regulations. At the end of the 2022 season, IMSA retired the Daytona Prototype international (DPi) class, which was the premier racing class in the WeatherTech ...
After IMSA's removal of the LMP3 class from the 2024 IMSA SportsCar Championship, this series is now the highest tier of racing for LMP3s in the United States. On August 29, 2024, it was announced that GT3 cars (GTDX) will be added alongside the existing two classes. [1] [2]
IMSA president John Doonan tells Autoweek a healthy roster of manufacturers and an extended partnership among sanctioning bodies is adding to the feeling of health and stability in sports car racing.
IMSA GTO cars at Road Atlanta in 1981. Grand Touring Over (GTO) [1] is the name of a former classification designated to grand touring cars competing in the IMSA GT Championship, and later by Grand-Am in the Rolex Sports Car Series. IMSA used the class between 1971 and 1991, [2] and Grand-Am used the