Re: The never ending exhaust questions?
If it growls, then it's a Lukey! Yeah it gives off a pretty good note, I was very happy with it when it got done. If you have a three speed auto, then you will notice that the gears are much longer so it takes a while before getting the note you want. But a 4 speed is sweet as.
You don't have to worry about it droning in your ears on the highway as I do a lot of highway driving it sits in low revs so it's pretty good.
I don't get any unwanted attention from the coppers, which is cool, but I live in a country town. It might be different in the city.
As for power, my XF blows away all of the other XF's in town and the only thing I've done engine wise is the full exhaust system, and regular servicing. you can generally notice it, I did, but it's certainly is anything to cream your pants over.