Is it possible to change your nascar from Nascar 07 into the car of tommorow?

I saw on youtube that people changed the car of today from nascar nascar 03 into the car of tomorrow.

NASCAR Needs to Change

This sport is no longer watchable. NASCAR has completely ruined this sport. There’s no competition, the cars aren’t and don’t look like stock cars. They go down the straight aways sideways. And the point system is a joke. And 90% of the caution flags are for debris. This by far is the most boring of [...]