2023 IMSA SportsCar Championship

The championship began with the 24 Hours of Daytona on January 28 and concluded with the Petit Le Mans on October 14 after 11 races.

LMDh allows choosing from a base chassis, of which there are four choices, from Dallara, Ligier, Multimatic, and Oreca, as well as a specification hybrid system on all cars, with freedom on aerodynamics, bodywork, and engine configuration.

[1] After initially announcing discontinuing the sub-championship entirely on August 5, IMSA later declared on September 1 that they would continue the WeatherTech Sprint Cup, a championship comprising only sprint rounds for the GT Daytona (GTD) class.

The only difference was that there would be no Sprint Cup-only rounds for 2023, to combat situations such as the record-low six-car GTD entry at the 2022 Chevrolet Grand Prix.

[4][5][6] Notes: In accordance with the 2017 LMP2 regulations, all cars in the LMP2 class use the Gibson GK428 V8 engine.

Points are awarded based on finishing positions in qualifying and the race as shown in the chart below.

There are also a number of manufacturer championships which utilize the same season-long point distribution chart.

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.
Indianapolis Motor Speedway returned to the championship's schedule for the first time since 2014 .