OOOCH! Thats the kind of thing to make your skin crawl. I didnt have that big of a crack, mine stayed together but had many small cracks. If the muffler is supported, there shouldnt be much of a problem, but like you said the whole thing is supported at that one spot which is certain death, that was my problem. I have to hack mine up to put a garret flange on it soon and may even coat them when done. Im also wondering where I could get that flange that MB911 has got, it looks bomb proof.
86' 930/GT-40R Sold
94' Rustang GT daily