H pipe or X pipe......

Gettin new mufflers.Any advantage to X or H pipe? which is better and what difference do they make.Muffler guy said they make the sound quieter.I don't have any crossover pipe right now.Do i really need?8)

I don't like any kinda crossover at all. Unless it's for support purposes only. To me, it kinda gives the exhaust a blahhhhhhh sound.Without the crossover, I think it sounds more crisp. But that's just me. Personally, you'll never feel the difference.