It's ridiculous how people are so quick to say thats "chavy" and whatnot. 
....Well, we are all different but I too fail to see how a DV is chavvy - It's the spacer (a different component) that makes that phwoooosheee sound that many find chavvy. I think I would just find the sound irritating after a while. DV stands for Diverter Valve, not Dump Valve. Our Mk5 GTI engines have recirculating valves.
A heck of a lot of development has gone into the Forge DV and it's been thoroughly tested from the cold of Finland to the heat of Bahrain, and on some very highly modified 2.0T FSI engined cars.