AEM 25-109BK High Volume Fuel Rail - Manual (Page 5)

j) Inspect all seals, o-rings, and washers. If any of these components look at all worn or damaged,
then replace with genuine Honda parts.
4) Assembly of the AEM Fuel Rail
a) Lubricate the threads of the banjo adaptor fitting with a light coat of engine oil. Place a –6 crush
washer over the side with the larger threads and install the banjo adaptor fitting into the end of the
AEM Fuel Rail that matches the placement of the fitting on the stock fuel rail. Be sure that the
crush washer is centered under the head of the fuel inlet fitting. (Fig. 3)
b) Install the –6 plug on the opposite end of the rail. Once again lubricate the threads and place a –6
crush washer over the threaded side of the plug. Be sure that the crush washer is centered under
the head of the fuel inlet fitting. (Fig. 4)
Fig. 3 Fig. 4
c)
The AEM Fuel Rail comes with an additional fuel port. If you are running a wet nitrous oxide
system, or a fuel pressure gauge, then this port may be used for the additional fuel supply. If you
are not in the need of an additional fuel source install the supplied 1/8” NPT plug. (Fig. 5)
Note: When installing the tapered plug or any other tapered fitting into the AEM Fuel Rail, use
only a lubricant or anti-seize on the threads. Do not under any circumstances use liquid
Teflon or Teflon tape as a sealant for any tapered plug or tapered fitting in any fuel system.
d) Your kit comes supplied with two 1/8 NPT plugs. DO NOT install the additional 1/8” NPT plug
if you are going to be using the stock regulator or an AEM Adjustable Regulator. (Fig. 6)
Fig. 5 Fig 6