Rewards: 74 Gold, R$74,000
Location: MASTER Unlocks from: 25 Trophies in Open Sky Challenge
Maximum Required PR: 75.6
There are 57 events, with each car having a specific 2-event Showcase and a Time Trial.
The gold Rewards splits at 25-50-75-100% are 9-14-20-31GC, and any one car upgraded to ~PR68 will reach 75% on its own. (A fully upgraded BMW plus lower McLaren got me to 89%)
The last 3 Cup races are PR72.5 - 74.2 - 75.6 and can initially be opened only with the Corvette...in around 3 weeks
#edit# sorry forgot to mention that in many of the events some of the AI bots can also be driving Nissan GT-Rs...not a problem most of the time, but could be if you get one in the Drag races!