turbo gaskets

where do you find turbo gaskets, like the downpipe gasket and intake?

Underneith the valve cover? Could possibly be for redirecting sprayed oil from the oil squirters.

that was my guess, but there is some sort of screen under that, maybe acts as a filter

Hmmmm, I can’t remember what it looks like off the top of my head. I’ll have to have a look at it.