The IMSA WeatherTech SportsCar Championship is a sports car racing series based in the United States and Canada, and organized by the International Motor Sports Association (IMSA).

The season begins the last weekend of January with its most famous race, the 24h of Daytona, and ends with the Petit Le Mans (on the Road Atlanta track) in early October. Another famous endurance race in this championship is the 12h of Sebring.

Class structure

There are five classes in this series, featuring three sports prototype categories and two grand tourer classes. The Sports prototypes consist out of:
-Daytona Prototype International (DPi) which is the flagship class of the championship
-Le Mans Prototype 2 (LMP2): analogue to the specifications of the FIA/ACO 2017 Global LMP2 regulations
-Le Mans Prototype 3 (LMP3): this class of prototypes features cars built according to ACO's 2020 LMP3 Generation II ruleset specifications

The Grand Touring classes consist out of:
-GT Le Mans (GTLM): it consists of cars matching the ACO's GTE specification.
-GT Daytona (GTD): the class adopted full FIA GT3 specifications.

Season calendars

Link to the 2021 calendar

Sources

Wikipedia IMSA WeatherTech SportsCar Championship
IMSA WeatherTech SportsCar Championship
IMSA on Twitter
IMSA on Facebook