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Re: How much sound insulation?
Just applied Lizard Skin to the rear section of the suburban after replacing the wood bed with metal. I did not measure db before and after but to the naked ear I would say there is no "significant" difference. (Hard to drown out a 454 Chevy running headers and Flow-masters) Next step is to rattle trap the entire car, and maybe invest in some MIP rubber mats and probably switch to Magnaflow mufflers ;-)
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