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Catalog #4779
Rev.10/05 - RS/mc
©2005 Edelbrock Corporation
Brochure #63-0463
Page 2 of 2
Edelbrock Corporation • 2700 California St. • Torrance, CA 90503
Tech-Line: 800-416-8628 • E-Mail: Edelbrock@Edelbrock.com
INSTALLATION PROCEDURE
1. Support and secure the intake manifold properly in a drill
press or on a work bench to allow a straight drill path to the
injector bosses
(See Fig. 2 for reference)
.
2. Using a 7/16” drill bit, drill through the blind holes in the
injector bosses.
Warning: Use caution as the drill may tend to kick back
as it breaks through to the intake manifold runners.
Warning: Be careful not to damage the o-ring sealing
surface when drilling the injector bosses.
4. Insert the appropriate injectors for your application into the
intake manifold.
5. Press the fuel rail onto the injectors. Using a fuel system safe
lubricant on the o-rings will help make this easier.
6. Bolt the fuel rail to the Performer-X intake manifold using the
supplied 1/4-20x1-1/4” bolts and the supplied washers.
7. Apply a fuel system safe thread sealant to the threads of the
3/8”NPTx-6AN adapters and install them into the ends of the
fuel rail.
Note: You may also use any adapter fitting with 3/8”NPT
threads, if it is more suitable to your fuel system. Also, be sure
to allow the sealant to cure completely before allowing fuel
through the fuel rail. Fittings may also be installed before
mounting fuel rail onto the intake manifold. Make sure to
secure the fuel rail in a soft jaw bench vise.
Fig. 2 - Reference Dimensions
7/16” Dia.
20° (4771)
23° (4774 & 4778)
1/4-20
(Coarse Thread)