Here's the sound of the HR y-pipe, RevUp airbox, and 05/06 midpipe on an 03 sedan
 

Since revving in place videos proves nothing for sound quality under load, here ya go. The setup is the RevUp airbox, a slightly enlarged Powerduct, HR Y-pipe, and 05/06 sedan midpipe. As you can tell, not having the Z-tube on my car doesn't seem to dumb down the sound quality of the intake and it sure does drive better, IMO.

Video is of the car under about 25% load, manually shifting at 4000rpms. I absolutely love the sound quality of all these OEM parts and I'm pretty shocked at how loud the setup is while not introducing an ounce of drone or excessive volume in the car.

Oh and listen closely, you can hear the infamous axle click, both sides :icon17:

http://i147.photobucket.com/albums/r...h_Noz-tube.jpg

sounds great