Not #6 and no Porsches there.
If you look at the solved ones you should recognize the pattern that links all these cars: a 'side blade' that is more a styling element that a mere air intake. In addition to that it is in a different colour too.
The remaining ones are slightly different because in one the contrast is not that evident (but it's a grey blade in a white, quite known show car) and the other is the real puzzle car, I mean the only car that will need some time to be identified (but following the same pattern).