[spool twice]

this sounds terrible, even considering that it's an i6...The N54/N55 sound substantially better; they actually change in pitch as you rev it. The S55 sounds flat when you rev it, there isn't a change in pitch as you rev it, just a change in volume (sound). There is nothing sporty about this sound; sounds boring and lazy.

With that being said, a secondary cat delete makes the N54 sound better, lets hope the S55 will sound better with a cat delete. An aftermarket muffler just changes the volume of noise, it won't get rid of that boring and lazy sound.