ChampCar Endurance Series
The ChampCar Endurance Series is a budget class Endurance Racing Series held on paved road race courses across North America, formerly known as the ChumpCar World Series, run by ChumpCar International Inc. Founded in 2009, the group changed its name in 2017, with registered trademark granted by the USPTO on August 28, 2018.
Source: Wikipedia — ChampCar Endurance Series (CC BY-SA 4.0)