does anyone have any sound clips of the sound or vids where i could hear the sound?
Because it's a Re-Circ valve you tehnically don't get any dump sound.
What you get is the sound of the air being dumped back into the intake system.
As has been said if you're running the std airbox then you won't notice a major difference.
If / when you get a CAI or Induction Kit, then you will hear the sound more.
If you're after the "Jap dump valve sound" then have a look at the Forge Split-R, as this is a partial BOV valve.
(An if you're rich the HKS SSQV does have a Re-Circ option available, but you're lookin at ~ £250 for that option.