Can't find Pre-order cars!

I have gotten far into the game and I noticed I don’t have any of my Game stop pre-order cars in my garage. Can I get any help?
(Also some info on Ken Blocks Ford Focus RS RX would be nice!)

The pre-order cars do not go directly into your garage, but you should be able to find them in the Auto Show.

Did you redeem the code you should have got from Gamestop