It's all the same with the contents of sim developers. Lacks of informations, details, instructions. Steam has downloaded the update and the Launcher do the update itself. But, in game, where I can find the 911 GT3 Cup Endurance? There's no difference with the "basic" one in the list. I tried to drive the Porsche with the new liveries. There's no ABS. And why in the "Content Updates!" post is indicated the "Porsche 991 GT3 Cup"? 991? 911, maybe? I'm confused.
when you select the porsche gt3 cup, click on tuning, then select spec, and you will found the endurance one
Found! Thanks to @CrimsonEminence. Here: https://forum.studio-397.com/index....-cup-vln-on-the-straights.64581/#post-1008069