Whats up with this? A lot of listings on ebay, craigslist etc. people are selling megabombs without the flange that bolts to the cylinder. First off, how does this even come off? Isn't the header itself wider at the end to prevent this and help tighten the pipe to head during install? Second, if its missing what are you supposed to do? Is this even offered from FMF as a replacement, and if it was how do you get it on? I don't mind dropping some coin on a used bomb to match my 4.1 but if there is no flange how do people expect the buyer to install it?