A while back I stumbled upon this. Not sure if it has been written about here, so I am putting it up for you.
The product info can be read here
I have bought it my self and it works. I had the old G version DV running on K04 APR setup. The stock DV work ok but was leaking and made a lot of sound.
this baby does make the system sealed and no sound is released and I am having the Carbonio intake.
There has been made two editions to this DV+ valve. Make sure to get the rev. Version with new spring.
You can read more in my thread started at golfmk6.com forum. (More info on the TSI engine then here)
GFB DV+ Diverter Valve Kit - anyone tested this? - VW GTI MKVI Forum / VW Golf R Forum / VW Golf MKVI Forum / VW GTI Forum - Golfmk6.com
You can buy it here.
GFB DV+ Diverter Valve Kit - 2.0 TFSI/2.0TSI - A3 (8P) - Audi - Shop By Car
Now go out and buy it. You've never have DV problems ever.
PS. The OEM rev. Piston DV leaks too.