I thought of this last night, but couldn't find anything yet. It seems like the resonance is much harder to hit when the car isn't moving (maybe thats just a psychological effect). But its hard to search for resonating pieces in the engine bay while in motion!:grin:
I now have most of the plastics off surrounding the dash. I have the vent fan motor out, the dash storage compartment out.. I still can't isolate it. Its driving me mad. Thought about just taking it to the dealer and telling them to fix it! But the resonance is definitely triggered by the note of my prodrive exhaust, and so I'm not sure they'd even care.
Anyway, I am starting to go mad over it. The rattle seems to come from the bottom of the A-pillar on the passenger side - right behind the dash under the defroster vent. its not easy to get back there is what I'm finding. I'd appreciate any ideas before I pull all my hair out.:Banane36: