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Dynamat?
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<blockquote data-quote="bass_lover1" data-source="post: 6346394" data-attributes="member: 555256"><p>The pressure that is created when you shut a door/hatch needs to go somewhere, that flap is what equalizes the pressure inside the cabin to the outside air pressure. You can cover it, but like I said it's going to be a bit harder to shut your doors if you do.</p><p></p><p>Dynamat will help. To step flex you need to add mass, which is exactly what stuff like Dynamat does. However, there are a multitude of choices as far as mass loading products goes, Dynamat is a good one, but it is expensive when compared to similar products.</p><p></p><p>Sounddeadenershowdown.com is a good place to start, you don't necessarily have to buy from him, but at least read up on the products he sells and what they do.</p></blockquote><p></p>
[QUOTE="bass_lover1, post: 6346394, member: 555256"] The pressure that is created when you shut a door/hatch needs to go somewhere, that flap is what equalizes the pressure inside the cabin to the outside air pressure. You can cover it, but like I said it's going to be a bit harder to shut your doors if you do. Dynamat will help. To step flex you need to add mass, which is exactly what stuff like Dynamat does. However, there are a multitude of choices as far as mass loading products goes, Dynamat is a good one, but it is expensive when compared to similar products. Sounddeadenershowdown.com is a good place to start, you don't necessarily have to buy from him, but at least read up on the products he sells and what they do. [/QUOTE]
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