It began on 28 January with the 24 Hours of Daytona, and ended on 7 October with the Petit Le Mans.
[1] The class structure remained largely unchanged from 2016, with the major change coming in Daytona Prototype international (DPi) which replaced Daytona Prototype (DP) machinery.
The Prototype class is made up of LMP2 cars both in LMP2 trim, with the ACO specification Gibson V8 engine, and in Daytona Prototype international (DPi) trim, where manufacturers are allowed to alter certain body panels designed to reflect the automaker's design language, and run their own engines.
Mazda (Riley Technologies), Cadillac (Dallara), and Nissan (Onroak Automotive) run chassis from the respective constructors featuring manufacturer-specific bodywork.
Points are awarded based on finishing positions as shown in the chart below.
There are also a number of manufacturer championships which utilize the same season-long point distribution chart.