Holley 02121NOS - Manual (Page 12)

2. Install the 4AN fitting (12) into the injector block with Teflon paste, while secured in a soft jaw vise. Tighten securely. See
Figure 9.
WARNING! Do not tighten fittings while installed on the fuel rail. Install these while secured in a soft jaw vise.
3. Thread the 90° end of the 6” 4AN hose into the fitting in the injector block (hand tighten and add a 1/2 turn). See Figure 10.
4. Insert the “injector block” with O-ring pressed into the rail. Lube the o-ring with o-ring lube or Vaseline. See Figure 11.
Figure 7 Figure 8
Figure 9 Figure 10
Figure 11
5. Using the supplied bolts and washers, tighten the injector block down after installing the fuel pressure sensor on top.
CAUTION! All debris must be removed from the fuel rail. Failure to do so will result in an engine failure.
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