So a few months ago I installed an aftermarket subwoofer into the OEM location. I dynomatted the whole area and cut a grill opening in the lid.

The setup sounds great at low volumes but when I go loud it results in rattling noises all over. I assuming its the cheap snap-on plastic that makes our Z's so prone to rattling. The noise is pretty bad so now I'm considering dynomatting the whole rear trunk area.

I've searched others on here who've done this and it seems I'll need quite a bit of dynomat. Any suggestions how much is exactly needed and my approximate costs for the project?

 

bump.. wondering same thing..

 

Search this subforum with key phrase "sound deadening."

You will get a lot of information and an answer to your question.

--Spike