Endurance Spa-Francorchamps 100

Hello everyone,

i finished the game long time ago. Now i try to get more GS for the rewards system. I have to compete in the “Endurance Spa-Francorchamps 100” race with extra lengh for 50GS but i can’t find the option for that.
Could you guys please help.me out?

Finished every cup.

Go into that event, move to the right so you go to the second page and go into assists. You can set extra long at the bottom of the assists list.