Looks like the DV spacer to me.
It's only 3 bolts to pull it off.
I may be wrong but I thought these only fit on the commonly failing older diaphragm DV?
I just picked up this 2007 gti and I was changing the oil the other day. I noticed this part (pic above). I thought the car was completely stock but the previous owner installed this. I'm not sure if it's the Forge DV or the atmospheric spacer (link below).
Anyone know? Thanks in advance.
Remove the spacer, and check the diaphragm. It's easy to see when the diaphragm is failing. It'll have cracks that show up when you gently push on or twist the rubber material.
If it's failed, re install it and order the new RevD version. no sweat. Car should run ok on the failing diverter.
06' MKV GTI 6MT - APR Stage 1 - Upgraded OEM DV
Last edited by chadk; 08-09-2012 at 11:44 AM.