That is a very nice looking car!
As for the police watching you, there'* not much you can do, but time will ease them. Usually it doesn't have anything to do with the car, or the way it looks, but the driver of the car.
Usually a big nice car like that with a youth driving it raises flags in certain parts of the U.*. Here, it'* not a big deal. But I'm sure other places are different.
Think of a young guy in a nice Cadillac. It'* about the same image.
**EDIT** P.*. - the radar detector in your windshield will also raise flags with law enforcement.