SHELBY GT 350 Member
Joined: Sep 2010
Location: see user name
How attached are you to that X pipe?
In my experience, they are largely responsible for the drone. You can make it quieter or louder depending on choice of muffler or resonator, but it will still drone.
I have an SLP catback and have been through all 3 of their resonators over the years. The best one as far as reducing the drone from my X pipe was the Powerflo muffler. Bit quiet for me at the time though but still had the deceleration "pop" you're looking for. Little louder, basically perfect in terms of loudness was the LM2's. Made the car sound really pissed off, but Drone City in 5th gear at highway/freeway speeds.
Last year I made the change in midpipe to Mac Prochamber (still running the LM2's). Quieted things down a bit, which after 7 or so years of the last setup I was ready for, but the big thing was a huge reduction in drone. "Tone" is kinda somewhere in between an X and H pipe, lost some of the decel popping but still sounds like a beast at WOT without saying "hey look at me, I'm special and I want to race everybody" like the X pipe did.
2001 GT Convertible
All the usual bolt-on's /200 I6, C4
And a few Explorers too... 2008 4.0 XLT 4x2, 1996 XLT 5.0 4x2, 2003 Sport Trac XLT 4.0 4x4