Karcepts KFL02 - Manual (Page 8)

5. FUEL LINE INSTALLATION
1. Connect the Karcepts supplied High Pressure Feed Line from the OEM fuel filter
to the left side of the Karcepts Fuel Rail. When tightening the line to the
reducer fitting on the fuel rail, it is recommended to use a wrench to hold the
reducer fitting. Both ends of the feed line are able to swivel before being
completely tightened. Make sure to swivel the line in a position that does not
allow the hose to rub up against any sharp surface as engine vibrations may
fray the line if not locating with care.
2. Locate the Karcepts Low Pressure Return Line; and by hand, screw the 90
degree fitting end to the bottom of the fuel pressure regulator. Before
tightening the fitting, it is EXTREMELY IMPORTANT to support the FPR
body in your hand when tightening. We do not want to allow the
tightening force of this lower fitting to be transmitted to the -8an to
-6an swivel fitting located on the left side of the FPR body. If not
supporting the regulator body when tightening, you may damage the
-8an to -6an swivel fitting and promote a fuel leak.