Ford Exhaust System :: Slapping Noise At Full Throttle

Any turbulence in the exhaust note, ie. slapping noise at full throttle. I have run 3 different mufflers in one year on my true dual and also gutted the cats. I currently have 2 1/2inch true dual with gutted cats and cherry bomb extreme mufflers. I Also am running an H-pipe, but I feel it isn't doing its job so well to balance the two sides. My trucks exhaust is almost perfect, it starts mean and loud, and has limited drone at highway speeds and great flow and power, but when I am smashing down the throttle the exhaust goes everywhere and makes all sorts of weird noise.

I almost feel that I should of went 3 inch to allow for me air to get out of the motor, I think the 2.5inch is restrictive possibly hence the air is having a tough time squeezing out of the system. But anyway do you think if i ran an X pipe it would work? Its my last option because otherwise i may convert back to the a single 3 inch dual 2.5inch outlet again, i miss my old set ups mean consistent tone at full throttle.