Talk:RR3 Wiki:Sales This Release/@comment-183.82.23.85-20180117110335/@comment-32155055-20180117184459

I'm guessing that you haven't bought the car with the Get It Now price tag. Buying a car with Get It Now price tag allows you to unlock the bonus series the car features in.

Also it must be that you have not unlocked McLaren Generations (which unlocks High-Tech Legends) and Group C: Championship (which unlocks Porsche Performance Showdown).