forge diverter valve help

So I got a Free DV from a fellow enthusiast that he said he never used, never touched, anything. Gave it to me since he drives an MK4 R32, and the DV is for an MK5. I install, ready to hear some whipple and such, and I get a nasty squealing, almost scraping sound when I shift. I looked at other...

So I know this subject has been debated before but I'm new to this forum and I am a new GTI owner so I would greatly appreciate it if someone could help me out or refer me to a previous post. My question is which forge "if any" kit should I go with BOV or DV?

Hey guys, I bought my 2007 GTI a few months ago and found a forge diverter valve laying in the trunk. It was definitely used because it was a little dirty, and im pretty sure its missing parts because it doesn't even have a spring in it. id like to get the missing parts and either use it or sell...