I've been wondering about this for a few months now. Not exactly sure what to call it besides a clip. On the 4.0L It's where the front fuel line connects to the fuel rail. I will post a picture of the one on my truck (IGNORE THE RUBBER RING. THE LINE LEAKS AND I WAS TRYING THAT TO STOP IT.) I need to know if there's anywhere to buy these clips? My brother said he's went to a few part stores and they don't have it. Mine broke one day after the picture of course.. Then I have another problem. Even when that clip is in all the way, it leaks fuel badly from the line. Looking at another Comanche in a junk yard it had a second plastic piece inside of the fuel rail. Any idea what that is? And, where I can buy that too?