Flowmaster exhaust 03 CVPI

Hello,

I have a 03 Crown Victoria Police Interceptor and I am looking to do some basic mods to it. It is all stock and in really good shape.

This is my question:

If I do a Flowmaster cat back exhaust system would it give it a nice rumble like the mustangs? Do mustangs have dual overhead cams? Not looking for more power just a little reasonable noise... Thanks for any input