H pipe question, regarding sound.

The X or H either one will tone down the reverberation, but I don't know about the pipe ring.
I know for a fact that 40 series Flowmasters about 24 inches from the header collector increases that pipe ringing sound because the mufflers themselves make that sound also.
I'm running 2.5 X pipe dual exhaust and it definatley rings those Flowmasters.