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Originally Posted by imag
That is *exactly* what I want, with provisions for easy removal. I wonder if I can even build in some of the sound insulation onto the enclosure rather than the car.
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Actually owning a Z, I can comment here. With the in cabin noise at the levels it is (it is a sports car afterall) it would take a large amount of dampening to have an overall impact on sound quality. Yes - adding some will help... but no more than turning up the volume. The car is solid and well put together, I don't have a problem with rattles- its the road noise that's a killer. Since you'll probably be removing the foam blocks to put the sub in, adding a few layers of ensolite fabric might not be a bad idea. It'll keep you from having layers of butyl like material (edead, rammatt, dynamat, etc) and probably keep you at stock NVH levels, if not a slight improvement. Plus, you can easily roll it up and take it out on track days.