this thread is an absolute joke, dont take anything CoB said in that thread with anyseriousness. that can happen with any muffler and he is just over reacting and butt hurt. heck i've personally seen the baffles break free inside Flowmaster mufflers in more than one occasion, on road not even off road.
I even busted a Borla XR-1 muffler up off road, also CoB noted that the packing inside the muffler burnt away? of course it is a glorified glass pack, so is Borla or any other turbo type muffler. they all burn out and get louder, its just the nature of the beast.
i just purchased my first Magnaflow muffler recently, i normally buy Borla but $40 for a muffler is better than $150+ for a muffler and its even stainless steel to boot. i have a different part # than CoB but i have had my muffler for about 4 months now and logged close to 10,000 miles on it with no problems yet.