Engine/exhaust sound based on the setup.

[Venom]

Well, actually the turbo blow-off sound changes with the different stages wich is kinda cool.
I just would prefer to rework a few already existing sounds, most of them sound really good but super gt for example has a kinda bad transmission if i remember right.

That's probably one of the examples of placebo effect (or whatever you want to call this) I've seen in a long time.

Turbo doesn't change its sound at different levels and there's not "short-cut gears transmission" sound either.