Does everyone elses Xg350 sound like there is a muffler problem?

What other conditions , besides accelerating? Is the same noise present if revving the engine while in park? Is it only when going above a certain speed? Damn details getcha every time.............8/28......doesn't help if you don't reply either , it just means more annoying wisecracks from me.......but hey I'M NOT the one with a Hyunduh

I have a 2005 model. My original muffler is still good however the flex pipe needs replacing which makes the car sound a bit louder especially when accelerating