v10 broken manifold flaps?

as i was trying to pinpoint the source of the oil leak, (i did the passenger valve cover seal, will be doing driver side tomorrow), i had my wife rev up the car, the thing clatters like crazy! not a normal/good sound.
it has great power and cant hear it from inside…to me it sounds like its coming from the intaje manifold…
may have a few broken flaps I assume?
https://www.youtube.com/watch?v=6tom8rZbKQw