The fuel rail,on some engines have a sharcder valve.There's a big nut cap on it.I had a fitting that connected,my gasoline to fuel solienod.I connect to my rear battery with a relay.Ran hot wire to cabin,and back to solienods.I bought a extra pressure valve that shuts down nos if fuel pressure is low.I use the instructions at N.O.S. sniper system for E.F.I.I used same plugs and timing with a 125hp shot.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran