This line is cut off in 1 end .Gas line Nna6085bb same as nna6085db.nna6085ba ,nna6985bh,.   Good used hose is cut at one end look closely .about 19 inches long so you can flare it back together.

.This line is not to the fuel filter. this is from under gas tank  to the engine . Nna6085bb return HOSE I had to cut it off in 1 end because there was no disconnect part  look closely .. USED FUEL return  HOSE gas TANK bottom  part number nna6085bf. TO engine cut off . FITS 1998-2003 XJ8 , 1995-1997 XJ6 fits vanden plas all 1995-2003 4 door  models.  hard to find. Cave file 506 , file 21 cave file 521.cave 523 cave file 525