This script mod in Need for Speed ProStreet fixes missing exhaust systems. You can notice this visually in the rear of the car, from a third person. And this also applies to the cars of AI opponents.
To fix the problem with exhaust systems, the program "NFS-VltEd" will help. Just install the script "exhaustfixes.nfsms" in the game, and save the changes.
Mod "Invisible Exhausts Fix" free download for NFS ProStreet, it allows you to fix exhaust systems. Be careful during races!