just bought a legacy twin turbo today and the guy has tried to fit a forge dunp valve ad made an **** of it no bung etc, gonna try and sort it the morrow but what size bung do i need to try and get??
thanks in advance if anyone knows?
must be about 25mm ??

 

I had 1 of these a few years ago,and dont quote me i think it was a 28 mm bung.

 

just cant see how to measure it lol was hoping someone would know for deff so i could just go get one lol