Help With Recirc Valve !!!

[Harry_LeonCupra]

Hello all,
Ive been looking around for a nice sounding recirc/diverter valve, all I want is for it to sound like these 2 I've found on youtube..As I cant post Urls because i'm new to this forum, i can only say type in on YouTube:

'Seat Leon vs Ferrari 360 Modena (Part 2)'... (cockpit cam behind the Ferrari)

'Seat Leon Blueflame TurboSmart'... (should be a silver Cupra R)

Is it good for my turbo for it to sound like so??.. and how do i do it??.. Ive already done the N249 By-pass which helped a little but this sound is to die for ... Help would be kindly appreciated !! ...
Thanks in advance and sorry I can't post the Url.
-Harry

Leon Cupra 2000 180bhp

 

[andycupra]

turbo stall? not good.

 

[Dante L2A2]

I like that fluttering sound aswell. I think its something to do with air going back through the turbo witch as said is not good