So, in other words, it's a fiberglass packed muffler. NO THANKS. Been there done that. It's sounds real good when first installed, but the longer you run it, the louder, more obnoxious it gets. I had a Dynomax Super Turbo on my truck.
So far, the Aerochamber is the only muffler that I've used that sounds good on the outside, and quite enough on the inside to where I can hear my music without having to turn the volume wide open. There is a difference in being loud, and just flat annoying.