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Yup, I have them on my build. I am using the stock fuel rail with them on the fast 92mm intake. They should fit an LS1/6 intake too. Stock wire connectors work too.
So no problems with height using the stock fuel rail
The fast 92 was designed to accept the stock rail and injectors. I used the fast injectors with the stock rail on it on you can see that the rail sits perfectly into its designated crevice (which is where it was meant to sit with the stock setup). So I assume they are exactly the same fitment. No height issues.
