Muffler question- flowmaster vs. ?

BigBlockMopar said

An X-pipe makes the engine sound more 'mono', instead of Stereo with two seperate tubes.
Also, the mono-sound makes the car sound more like a modern car.

There was hardly any power gain to be measured, and if any, it would be just a tad at the higher rpms, accordingly to David Freiburger and Steve Dulcich in one of their YouTube-episodes.

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The ideal setup where the crossover can have a real effect is if the pipes off the header collectors are the same diameter (no reducers, as in 3" pipe hooked up to 3" header collector) and are made to specific length of about 3-4 feet (depending on engine setup) before the crossover... you can get some pretty strong secondary scavenging from that but like David Freiburger said, "the crossover is basically going to go wherever it fits in the car."

I have Pypes X-pipe system on my Duster but with Classic Chambered PowerStick mufflers, unique sound for sure but I think I would prefer an H-pipe. It's like you describe, sounds more "mono" and smoothed out a bit more like a modern car at cruise and WOT. Those mufflers are pretty dang loud though you definitely still know it's an old-school Mopar V-8.