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I ordered my second skin damplifier today and went to take a look in my trunk and get an idea what i had to do and i saw this gunk on the wheel wells and floor of the trunk. any idea what it is? sould i chip it off before laying the damplifier down or can i just lay it overtop???

 
Rep Power: 352

could be that you had an accident n they used some kinda goo glue thing......

 
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The flat black stuff is factory sound dampening.

The lava like stuff...I don't have that in my car.

 
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well the lava stuff is under the factory sound dampening so you know it is from the factory.

 
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seeing how thats factory dampening i will see a diff with damplifier and heatwave over top? i have a really loud exhaust...

 
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Definitely. The factory stuff is minimal. It is effective as far as it goes, but to keep weight and cost down, it doesn't go very far.

 
Rep Power: 319

factory sound dampening material is good for factory equipment...if u add dynamat it will kill a lot of excess vibrations...

 
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ok this is officially weird because my 05 vp has the "lava" like stuff and not the other ( what looks like a mat maybe?) unless im thinking of the wrong spot...

 
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mine was on wheel well and here and there everywhere else in the trunk. thats th only place i looked so far

 
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if its peeling, tear off whatever you can with your fingers. dont leave any that isnt securely and permanently attached to the car. the rest? lay that damplifier right over. remains integral to the car.

 
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yeah when we gutted my friend's 05' mustang and 91' 240sx, we encountered it in both. and my minivan had it(yes i had subs in my minivan)

 
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if u notice in very expensive cars, thier silent on the inside cabin. thats because most luxury cars come standard with sound dampening material. Unfortunatly our cars come with pretty crappy sound deadners in the trunk area. i currently have 22 sheets of dynamat extreme in my trunk area, we ripped out the entire interior and found a lot of that cheap rubber stuff. i just slapped the dynamat on top and rolled it out. noticed a huge difference in sound, as well as close to nothing rattles with 75dB of pressure. something to think about, but yea that rubber stuff is just really crappy sound dampening material.