How to lower racer traffic of certain cars?

Im playing SLRR and every time I see a racer AI, its a mod I installed (bmw m3)
is there any way to fix this so I can see different cars?

You shall delete your save and create a new one everytime you add or remove a mod, that's the only way to "fix" it.

Added 2 minutes later:

Btw the next time you need to ask help about slrr make sure to go here; /d/312-fixes-gamecrashes-other-help&d=960

Also, seeing you didnt post there i believe you forgot to check our rules too, please have a look at them; /d/2542-rules

Ok thanks