Greetings! I have walked this path, pun intended, and can share my experience with you. I recommend checking out sound deadening and visiting the site where you will find a treasure trove of information about sound deadening your car, including product reviews and installation guides.
In my personal experience, using sound deadening has worked wonders. I took on the doors, the floor, and even the roof. This significantly reduced road and engine noise. The main thing is to carefully approach the application and cover as much surface area as possible. Be sure to invest in a good roller to ensure proper grip.
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