What is the 5" diameter screen that sits between the turbo and the round housing on top of the intake manifold? I can't find it on any parts lists. It got beat up when I took my stock turbo off to have it rebuilt. It looks like there may be some remnant of black foam on it too, but not much. Maybe it was just junk that got through the air filter over the years. It all fell down into the intake when I took the turbo off so I vacuumed it out. Do I need a gasket around that screen when I put it all back together? Can I just fix the screen up or do I need a new one if it is damaged?