I've got the above dump valve for sale, as I have gone back to standard.
It comes with a bung for the recirc pipe and spare bolts to bolt it to your intercooler.
The **** on the top adjusts the spring preload, so you can set it up for your car specifically to eliminate problems with idling etc.
It is in perfect working order, and I have stripped and cleaned it so it's ready to bolt on.
The only reason I'm selling is it's too loud for me! I am officially getting old.
More info here - Go Fast Bits 2008
Retail for these is about 150 quid, I'm after 50 plus postage.
Pm me if interested.

 

Sold!