At the end of that quest, we concluded that the right hand exhaust manifold heat shield was resonating at a particular rev band. One of the common suggestions is to remove those heat shields: they're made of poor quality metal that will rust / corrode / vibrate / what have you after a certain amount of salty winters.
However, on a turbo motor, it's a bad idea to let heat out: at a minimum, you're reducing the exhaust energy available to the turbo.
So, is it possible to use header tape or other heat insulation to replace these metal heat shields? I.e., can you get as good or better heat insulation without the metal, the vibration, the horribly rusted bolts, etc. by wrapping the manifold (or at least that part)?