In the video below you will hear the rattle when the rpm is between 2k-3.5k rpm. Its very prominent, as the rpm falls after I let my foot off the gas.
Sounds like its coming from underneath the car.

video link -> http://flic.kr/p/a25FaQ

I dont think it has anything to do w clutch/flywheel.
Blown exhaust gasket? Heat shield rattle? Something else?

I have had resonated test pipes for couple of months now and this noise just started this morning.

 

I know mine was making noise with quick rev to 3k n let it drop slowly...
Got HFCats got rid of that sound but now there is a different sound lol. You cant win with these cars...
Also heatsheilds tend to get loose sometimes.

 

could be an exhaust leak? or your TURBO SPOOLING

 

^ yea, im leaning towards an exhaust leak cuse of a blown exhaust gasket or something like that, but i have no idea right now.

 

Probably just a heat shield or something with the piping. You should be able to pinpoint it if you put the car on a lift.

I have a current rattling sound too, got my car on a lift and started banging on everything, found that my drivers side TP sounds like there is something loose inside of it.

 

^ test pipes dont have anything inside of them.

yea, im really hoping its something easy like a heat shield loose.

 

I know, but thats what is sounds like

 

yes, even my noise seems to be coming from around the driver side... i think its the heat shield above the TP hitting it... but again, im not sure.
i need to get it on a lift... have a person rev and the other pin pointing where the noise is coming from.

 

HAD THE SAME NOISE!! low on oil dude.. i just added some oil to and it was gone..

 

dipstick was sitting on H... thats not the issue.
i can bet its something else.

 

I posted in your other thread, check all of your bolts and O2 sensors on the exhaust. Even if you're "sure" thats not it. GL again

 

^ yup, read it, thanks.
im leaning and hoping its a heat shield or TPs or a bolt or the o2 sensor or a combo that are lose, which is causing the noise. i will have somebody check it out soon.
will post update.

 

I know it's annoying lol. It drove me nuts all the way from chicago to detroit and back lol. Those components get REALLY hot and stuff will work itself loose.

 

mine did too, just keep checking it you'll see. You can buy some oil at auto zone and just add some, it might work. One bottle of synthetic oil is less then 10 bucks, it wouldn't hurt to try.

 

Heat shield also check your cats