Possible issue with resonator?

[Cloontang]

I have long tubes and high flow cats with the stock exhaust. I am getting a very annoying noise at low rpms (under 1k) and also while slowing down when driving. I went under the car checked all my connections and made sure they were all tight. Everything looked fine and I don't think it is an exhaust leak. I then started to move around my pipes and found a rattling noise coming from the resonator after the cats. It sounds like something broke loose in there and the vibrations from the exhaust are causing it to rattle. Does that sound like the cause of my problem? And if so do you think I could get a dealer to replace the resonator?

[Dimitrim]

Get the car back up in the air and with a real heavy rubber/leather bang the resonator, and all other exhaust components in the exhaust system. 3/36,000 warranty on that resonator. When I put in my cat back system, I eliminated that from my exhaust.

[Scott@Bjorn3D]

Exhaust warranty void due to headers. Just have resonator taken out and put X-pipe in its place.

[Cloontang]

What would I be trying to accomplish by banging on the exhuast? And I figured I voided the warranty on it, just wondering if it was worth a shot haha.

[Destructo09]

sure it's not rattling on the cross brace under the exhaust?

[BAD DAB]

You did'nt say if you had tuned your AFM out. Are you sure its not the noise of the engine cutting back to 4 cylinders. With headers and high flow cats you will be able to hear the afm kick in and out more.

[Cloontang]

I'll get under and double check the cross member first. Yes it's tuned and the headers have been on about a year and a half, the noise started recently.