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An "Advanced search" would likely generate more discussion, if not here in the C8 Forums, certainly it would in the C7, where it has been discussed extensively for years. Much of the info would be applicable to about any vehicle.
From: In a parallel universe. Currently own 2014 Stingray Coupe.
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I'm sure there are vendors that sell a complete insulation kit for the car. With past generation Vettes, installing an insulation package did eliminate some road noise as well as keep some heat out of the cabin.
I insulated my C-6 with Dynamat Extreme and noticed a remarkable difference even with run-flats. Everything I could access was insulated including hatch area, doors, rear quarter panels and firewall. Personally, I believe it would be a much bigger job than the C-6 but doable given enough time and fortitude. The cost on the C-6 was about $600 if I remember right.