Flowmaster 50series question

If you want to get rid of the droning/blat sound you need to put a balance tube between the pipes before the mufflers...I have the Flowmaster Delta 44s on my car and it is loud even all the way to the back.. When I read up on the issue it was highly recommended to install the balance tube or X pipe to equalize the exhaust pressures... I still have not done it but I can live with the sound for now... It is out back so it's not as bad....Bill