Aeromotive 14127 - 99-04 5.4L LIGHTNING_HARLEY FUEL RAIL SYSTEM - Manual (Page 3)

supplied mounting bracket as a template, mark the bracket mounting holes and drill to accept a #10
screw.
20. With the bracket attached to the regulator, mount the bracket and regulator to the vehicle using two
#10 screws, nuts and lock washers.
21. Install one AN-10 o-ring on each of the two AN-10/AN-8 cutoff tapered flare fittings and one o-ring on
the AN-06 union fitting.
22. Thread the side of the AN-10/AN-8 cutoff tapered fitting with the o-ring into each of the two AN-10
ports on the regulator. Also thread the AN-6 cutoff tapered flare into the bottom of the regulator.
23. Install one AN-08 o-ring on each of the four AN-08 cutoff tapered flare fittings.
24. Thread the o-ring side of each four AN-08 cutoff tapered flare fittings in the back of each fuel rail.
25. Inspect the o-rings on the OEM quick disconnect fitting and replace if necessary. Coat o-rings and
the adapter fitting with a light oil and install the AN-06 / Ford quick disconnect adapter fitting on the
OEM By-pass fuel line.
Please note if installing a high performance fuel pump, (Similar to Aeromotive P/N 111-01-BF)
the OEM return line will be too restrictive to handle the volume of fuel that these pumps are
capable of pumping. To prevent loosing lower pressure adjustablity of your regulator it will be
necessary to replace the OEM return line with a 3/8” ID (AN-06) return line in these cases.
26. This kit contains one AN-06 straight hose end which will connect to the OEM fuel line adapter fitting
and one AN-06 90 degree hose end, to connect to the AN-06 union on the bottom of the fuel pressure
regulator. With these fittings in place, measure the length of fuel line needed. See section titled Hose