Unhappy 360 (At idle)

The ugly noise in the video is from a metal tube that goes from the exhaust manifold, connected to the air filter box with a rubber hose when it´s in place, som sort of remains of the pollution stuff I think.

Can you take a picture of that? Do you have an air pump (smog pump)?

I'd also be looking at the egr valve. If it's open when it shouldn't be, it can cause trouble.