crAzy

I have been having this rattle every so often over some bumps in the road. It is very annoying and can be heard over the radio. Now my radio is aftermarket and I have some extra crap behind there, but yesterday I removed the radio and wrapped anything that I would think would cause a rattle with microfiber cloth. Put everything back together and it is still there. Car is a 2006 Z06 with 62k miles. Any ideas?

J3TVETTE

Honestly, I would pull the stereo and drive without it. Maybe the noise will still be there and be easy to spot. No OEM NAV parts left behind right? Perhaps OEM antenna smashing around in there.