This is the final leg of the event for the prize car the Porsche 963. The 991 GT3 R (992) is winnable from the related showdown and is required for a lock-in. As well the prior prize cars are needed. The problem with the event like this is that you have to already have won past prize cars, and built them, to have a chance at this. Its not easy even for a long time player. The two prizes are cool looking but not much use long term outside of events.
At this time, Maxthegamer has 3,662,954 views for CSR Racing 2 spread across 792 videos. His channel published over 8 days worth of content for the game, roughly 82.27% of CSR Racing 2 content that Maxthegamer has uploaded to YouTube.