I think the real issue is that you don't want to hear everytime the engine goes from 4 to 8 cylinder mode. If you have a loud exhaust, every time you give it a little gas to pass someone, you would hear it fire up the other cylinders, and then as soon as you let off, you would hear it drop those cylinders. I would imagine that would be annoying.
Hooters, hooters, yum yum yum, hooters, hooters on a girl thats dumb.
07 2WD Trailblazer SS, LS1 E-fans, 4" FWI, pcmforless tune