Board Thread:Game Discussion/@comment-73.125.167.49-20190401014548/@comment-34556626-20190401151040

Racer KCain10r wrote: In earlier versions of RR3, In 2018, having a car for the race and 37 trophies in the Zenith Series, unlocked Endurance Legends, but that may have changed in one of the updates. You can try to get the 37 trophies and see if Endurance Legends unlocks.

If it does, report back, and document the version of the game in which it worked. I think they later changed it so that you need to complete a certain amount of trophies of CSF. But everyone who had the 2014/2015 cars were grandfathered in.