General Maintenance & Repairs - Need Hlp(harsh rattling in exhaust)

nobody knows what this problem is. i gotten my cats changed twice. o2 sensors replaced, all kinds of bull.... i think its comming from ,possibly one of the manifolds... it only does it at certain rpms , and only does it when it gets warmed up... DOES ANYBODY KNOW WHAT THE HECK IT IS????

got a flowmaster? i did and that peice of shit rattled like hell

Check heat shields.

Heat shields make for some nasty sounds. ^^^ If you find some loose try to drill a hole in them and use some wire to piece it back together. Several girls I have known would not drive their car it sounded so bad... the culprits, heat shields. Literally a 10min fix they freked about. As soon as I took the cars out I knew exactly what it was. Very distinct noise.

Some years ago, I had my ENTIRE exhaust system removed including the cats and I would bang them all around on the floor looking for something stuck in them... Couldn't figure it out.

I went to the dealer, and the tech reached straight for one of the exhaust sensors... It was loose, but it's rattling make it sound like there's something metal rattling around under the middle of the car.