[MiracleMax]

I'm of the mind that the X-pipe is superior to the H, but like blue said, its a matter of taste on the street.

The h-pipe might make more power down low if the x-pipe is "too" efficient (read over scavanging), but thats just a guess.

its also my understanding that bafflled mufflers (like flows) inhibit the function on an X-pipe and that they work better with a straight through muffler like race bullets.