Nitrous Express LS1 NXL - Manual (Page 2)

5. Flip injector rail over. This will allow you to remove injector lock clips. Once you have removed the
clips take the injectors off of the fuel rail. Then inspect both o-rings on every injector. If the o-ring has
the slightest tear or cut, replace before reinstalling.
6.The rail fittings are installed in house. Then the rails are pressure checked to ensure a proper seal,.
The fuel fitting must be installed next. It is located on the drivers side rail directly in the center. As with
all pipe-thread fittings you must use NX thread sealer on all threads.
7. Now place the injectors in the fuel rail. You will need to lubricate the injector o-rings with some WD-
40 or some other automotive lubricant to keep them from splitting upon reinstall. After that the NXL
nozzles will need to be placed into the intake manifold. Once again be sure and lubricate their o-rings
as well. Then, using the factory fuel rail mounting studs, install the NXL fuel rail mounting brackets.
Make sure to leave them a little on the loose side to ease the installation.
*Note: It may be easier to install the NXL nozzles on the injectors before installing them into the intake
in a tight fitting application.