I'm going to be putting Dynamat in my car and I want to put under the carpet and possibly in the headliner. My question is after I take out the seats, console, etc, and then take out the carpet, is there anything special like glue or fasteners that hold it down? Same for the headliner... I know there are fasteners in the headliner, but what about glue? Will there be anything that I need to correctly reinstall either the carpet or headliner, like glue or what not? I just don't want to take them out and not be able to have them back in correctly. Thanks

 

i think putting dyno mat it in your headliner is over kill and there is sound deading material under the carpet

 

While I don't think you'll benefit from dynamatting the headliner, if you really want to it's not that difficult.
Biggest problem is the seatbelt bolts/clips.
There's no glue or anything messy, it's just some foam, bolts, and little clips/cheap fasteners.

 

Yeah and those cheap fasteners, how easy are they to break?

 

there was no foam around my oem seatbelts, you can take the panals out no pro just dont force stuff