Classic Endurance Racing and S cars with either +2.0L or -2.0L size engine. There are also two grand tourer classes, GT1 and GT2. Classic Endurance Racing Classic Endurance Racing (commonly abbreviated as CER) is a sports car racing series founded in 2004 by Patrick Peter's Peter Auto Ltd. It features classic sports cars and its aim is to support the endurance racing revival. The series consists of events in various European countries. Each race is one hour long. Previously it was a support event for the Le Mans Series. The 2015 season features six standalone rounds: All cars are to be manufactured between
ChampCar Endurance Series ChampCar Endurance Series In 2017, ChumpCar World Series (ChumpCar International Inc.) adopted the name ChampCar Endurance Series and filed for trademark rights after receiving the blessings from the IRL to use the name. A registered trademark was granted by the USPTO on August 28, 2018. ChumpCar World Series, a budget class endurance racing organization known as ChumpCar International Inc., was founded in 2009. Chumpcar was a play on words named after the defunct Champ Car World Series. The initial concept was an endurance racing series for cars of $500 in value or less similar to the 24 Hours of LeMons