A fuel filter has four of the cores arranged symmetrically about {HEAD ~ a longitudinal center line} of {TAIL ~ a housing} to form a longitudinal flow passage 
A fuel filter has four of the cores arranged symmetrically about { HEAD ~ a longitudinal center line } of { TAIL ~ a housing } to form a longitudinal flow passage
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH