Sound deadener ?

[ace_800 5,000+ posts]

I need some more sound deadener. I already have a coat or two or SS spectrum and changed my enclosure to a fiberglass thats right against the side of the car. Sounds loke the muffler is rattling like crazy. What could I add to stop it? I really don't want to paint anything. I do have a few sq ft of dynamat, I'd only get about 1-2 coats though. Hows rattle mat from Second skin?

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[blackbonnie 5,000+ posts]

if it sounds like the muffler either it is, or it is the heat shield for it. just add some deadner and if that doesnt stop, just add some bracing to your pipe