Another place you probably want to put it is underneath the rear deck. I got a good bit of rattle from that area, so I removed the rear deck, stuffed all the little holes with some carpet padding/foam I had, and then I lined the whole rear deck with a piece of padding/foam the same dimensions as the rear deck. I put the rear deck back inplace, pushed down hard, and secured it with the factory "snaps". It worked great! I'm not sure how dynamat works, but just from what I see from your pics....foam might be better for the rear deck...but I could be wrong...that dynamat stuff is supposed to be really good....I'm just too cheap.....what can I say??? :rolleyes: