Porsche, the undisputed champion of endurance racing, couldn't stay away from the sport for long. The Le Mans-winning 919 was retired in 2017, and in 2023, Porsche will be returning to competition in the LMDh class with an all-new car. The unnamed model is a joint effort between Porsche and Penske, and the highly camouflaged pictures provide just enough detail to show that the new car is a clean-sheet design. No technical details were released, but the LMDh category rules state a minimum weight of 2,270 pounds and a hybrid propulsion system limited to 680 horsepower, with at least 630 coming from the gasoline engine. The car will compete in both the FIA's World Endurance Championship and the IMSA WeatherTech SportsCar Championship, thanks to a merging of regulations for both series.