The 00s Coupe has been updated with a higher-poly model, standalone users can download here:
dropbox.com/s/44uhnt237m43j ... e.zip?dl=0
Note this will make any cars built with the previous version not work (at least it did for me).
Steam users should be updated automatically, apologies to anyone who has existing cars if you are unable to open them, I wasn't aware it would happen.
Also the 60s MR coupe will be updated soon.