Exhaust note question

The stock exhaust on my 05 X, is it supposed to "droan" or "moan" once it's warmed up?

I'm loving the sound of this thing, it sounds very similar to the 350Z. I will stop whatever I'm doing just to listen to a 350 or G35 climb the hill by my house, the exhaust note is like music.

I wouldn't say that the 05 stock exhaust sounds like a 350 or g35. Not really close.

But I do agree, those really sound sweet. Flowmaster 40 without air intake sounds closer to 350 exhaust.