[donoman]

I've sound deadened a roadster before (Miata) and it helped with road noise a little. On top of that, it helped the audio quality of the stereo so that I didn't have to blast it so loud. I just bought some insulation from RaamAudio. I've been dealing with them for years.

Most of the noise seems to come from the rear of the car. I'll insulate my doors and the rear firewall. I can tell the noise is coming from the rear particularly in the rain.