September 2017
One option that probably no one looked into is window customization.
In the real world,racing cars,well not all of them,have replaced windows instead of the stock ones.
You can see them on GT,Touring,Drift,WTCC cars...etc
It would be a nice addition to the car customization aspect of the game.
Here are some examples
September 2017
As it would be cool to get more of a race car look on the race, drift or even off-road cars, I doubt it will be THAT in depth. I could be wrong but, I do not think it will happen like this.