It is hard to say what the person at the dealership meant by that remark. But we know one thing: The statement was made in ignorance.
Now, you went to a dealer and expected an intelligent, helpful response. Have you learned why my sigline says what it does?

If you want an intelligent answer about modding ANY car, you go to the community that supports and loves the car. So, coming here is the right thing to do. But you are using the wrong title and posted in the wrong forum. Let's see if I can fix that....

*Moved thread and changed title"