Here are a few examples in the images above.
But we can have stuff like a racing wheel,brake,clutch to control the vehicles.
We can have some under neon glow also.
Also neon glow inside the vehicle.
Be able to change our tires,rims,hoods,roof,everything on our vehicles.
Most important NOS Bottles and it’s flames.
Being able to have something to measure our vehicle is speed.
Think Need for Speed Underground 2.
These are simply dream suggestions