thats a yes mate , i removed mine hence the cheap fix
if you are near the north east let me know and ill take it for you as the price you get quoted will be higher
not sure how it happen'd, i was installing it and i heard a click didnt think of it much at the time just thought it flex'd abit but once started it was blowing like a b1tch, I've got an XS one at spare but its pants,
yes you can , any decent fabricator can replace that for you. Are you using the correct downpipe for your application? You must use a Rev1 downpipe for a Rev 1 motor (6 bolt downpipe flange) and a Rev3 DP with a Rev3 motor.
And if you just purchased this downpipe then your authorized dealer will be able to replace this for you with a brand new downpipe.
Cheers,
Bryan