What is a Valve R.G.E?

Hi,

My Peugeot 307 1.6 110 SW 2005 has a problem with a "Depollution System Fault"

Peugeot dealer says it needs new:

x4 Injector Seals
x1 Tube Collar
x1 Circuit Seal
x1 Valve R.G.E (Priced at £277 inc VAT)

Only problem is i've googled "Peugeot 307 Valve R.G.E" just to see if A) I can get it cheaper B) I can have a look at it myself and C) See if I can do it.

Basically the question is What is a Valve R.G.E? as google CANT find it? Is it a typeo and Peugeot are just trying to rip my wife off?

Thanks for the help