Posted in Web Making Sense Out of the 5 IMSA Classes at the Rolex 24 at … February 6, 2021 The Rolex 24 is not called an endurance race for nothing, and making it to the end is a victory in itself. Factory- backed cars are not allowed in GTD, but factory- affiliated cars are, such as the… https://www.autoweek.com/racing/more-racing/a35325296/making-sense-5-imsa-classes-rolex-24-at-daytona/