In accordance with the 2017 LMP2 regulations, all cars in the LMP2 class will use the Gibson GK428 V8 engine. On 29 September 2022, the 2023 calendar was announced on the website and YouTube channel of the FIA World Endurance Championship, with the six races of the 2022 season and the return to Portimão, this time with a 6-hour format.

After being introduced for the 2021 season the LMP2 Pro-Am Cup was also dropped. Upon the discontinuation of LMGTE Pro, LMGTE Am remains as the sole GT class, although it will be replaced after this season. It is the first season in which LMDh (Le Mans Daytona h) entries will be allowed to compete in the Hypercar category for championship points alongside LMH (Le Mans Hypercar) entries, after being permitted on a race-by-race basis in 2022. World Championship titles will be awarded to the leading drivers in both the prototype and grand tourer divisions and to the leading manufacturer in prototype division. The series is open to prototype and grand tourer-style racing cars divided into three categories. The 2023 FIA World Endurance Championship is the eleventh season of the FIA World Endurance Championship, an auto racing series organised by the Fédération Internationale de l'Automobile (FIA) and the Automobile Club de l'Ouest (ACO).

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