Sup guys, I was looking for a good muffler, and I found one that I liked and at a decent price, but I have one concern. I've read that mufflers packed with fiberglass tend to change in exhaust note rather quickly because of the fact that fiberglass isn't very resistant to heat, and The muffler I like says that it has white fiberglass in it, along with steel wool for absorption. Now my question is this, should I be worried about the fact that there's fiberglass in it? Do name brand companies also use fiberglass in their mufflers? Any help would be greatly appreciated.

 

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