Before starting this I did some testing and knew that the XA-21 would be the slowest option, but after having tried out the Tyrant on stream recently I've decided that it would be silly to keep the XA-21 when that car is a possibility. Therefore the Tyrant will replace the XA-21 for the event. It will at least be more competitive than the XA-21 due to its high downforce and top speed, in addition to the flat track, whereas the XA lagged behind in a number of areas.
Therefore, all selections that originally had the XA-21 will be changed to the Tyrant (so if you had the XA-21 in 3rd the Tyrant will now be 3rd). If you are still happy with your vehicle preference lists with this change in mind you don't need to do anything, but if you want to amend your list post your new order now.
I'll draw the vehicles on Monday and release the list of who is using what. Then Pariah drivers will be able to submit their setups ahead of time to be spawned, and the same applies for Tyrant drivers if the car isn't released on Tusday.