.....my combination is a USA 2004 "S" with the factory headers and cats, a Circuit Werkes secondary pipe that has NO cats, and then the FVD Brombacher "Sound Version" muffler.
So my car has only one set of cats, like a Euro car.
It sounds as perfect as a street car can sound.
You will be pleased.
I have videos of a drive by, but those type of videos on a computer are actually useless in deciding how a car will actually sound underneath you.