I own and have installed the drift car pack. In the the autoshow on Formula Drift it says “purchased” on every car.I go to my garage, and it doesn’t show the cars, its a game bug ? I try to reinstall the Formula Drift but the same problem.
The “Purchased” means purchased as DLC, you still have to buy them in game for the price of “Free” that it shows. Once you’ve bought a car in the game, it will change from showing Free to 300k, which is what additional copies cost.
If you go in to the Autoshow there should be a button down the bottom to collect all free DLC cars, makes it much easier than doing them one-by-one (unless you’re close to the garage limit)