Has anyone tried this X flow?

[secondchance]

http://www.dynomax.com/mufflers.php?muffler=ultraflox

"X" flow supposedly should help with flow resulting in better scavanging. Down side has always been the dreaded drone.
Looks like this piece may achieve better flow with minimal downside. Has anyone tried this?
At leasy visually this piece looks like it may splice in for our Zs with minor alteration.