Thanks to Das Marten for this youtube video... https://www.youtube.com/watch?v=CUzuxWxzRvY

X-Bow GTX Purple 5 star car, 200 Tuner/European Tour credits?
2020 Mercedes-AMG GT3 300 Tuner/European Tour credits?

#1 2017 Nissan GT-R (R35) @ 7.100 seconds (not the Nissan Skyline GT-R (R34) Elite 35 that it says in the youtube video, look at the actual car)
... thanks to LazyBones for the tune/shift pattern https://www.youtube.com/watch?v=8FlgeuhneuM
#2 Ferrari 488 Pista Spider Elite 50 @ 7.460 seconds
#3 Nissan Skyline GT-R (R34) Elite 35 @ 7.556 seconds
#4 2020 Subaru BRZ TS Elite 35 @ 7.895 seconds
#5 Car Porsche 911 R Elite 50 @ 7.898 seconds