A few years ago I went from a plastic fuel cell to an aluminum in doing so I needed a longer return line from my pump to the cell as the fitting for the return was in a different location on the new cell . I called Jegs and bought one of their premade -8 hoses with fittings to use ... I checked and tightened the fittings several times and one still leaked. I went to my local speed shop and the owner made me up a new hose with brand name fittings and I never had another leak of course it was a lot more money than the Jegs . He said it wasn't the first time he saw that problem with " knock off " fittings . Jegs did however accept my returned hose and refunded my money