On the main air tube of my 4.9L, there are rubber hoses that have compression fitting on the ends. Simple question. Do they just pull off the ends of the metal air tube or do I need to just go ahead and work on cutting them off? I just want to know before I end up breaking the air tube trying to pull it off. I need to remove it in order to replace it with a longer, better hose when I install my new Exhaust system next weekend. Here;s the shot I have of the fitting.