Metallic Flutter Sound!!!

[leathers]

I have recently started to hear a sort of metallic fluttering sound coming from the rear right hand side of the car. It is mainly apparent when I'm in 1st thro 3rd gears, between 1000 - 3000rpm. Although it now seems to do it when the car is stationary and you just rev it. It is really apparent when the sound can bounce off a wall upon acceleration. I have read about this in the past on one forum but an in depth search has come up blank. I think it is something to do with the exhaust. Can anyone help?...........Oh it's a 2001 Boxster S with 33,000 miles.

Thanks

[dj1]

I have exactly the same problem on my newly purchased 2001 S(60,000mi). I brought it in for a state inspection and they did a quick check of the heat shields but couldn't pinpoint where the rattle originated. Now I have an appointment for next Thurs. Will update the result then.

[leathers]

Thanks dj1. My nearest Porsche dealership is 3 hours away, so therefore would appreciate any help diagnosing the problem.

[cbenitah]

I have the same on my -02 boxster s.. its the only boxster I've heard and thought this is the way they sound.. no?

Damaged cats?
Loose heat sheild?
Motor Mounts??

[leathers]

I am thinking damaged cats but surely they don't go after 30K and/or 6 years!!!