Fuel Rail/Pressure Regulator Adaptor -6AN Conversion
Product Description 
This works on RB/SR/KA fuel Rails. This fitting allows you to run an external(not on fuel rail) Fuel pressure regulator. It utilizes a Male -6AN fitting. This includes an o-ring already on the fitting for the rail and (2) allen style bolts to replace the old hard to use phillips screws that comes with the factory.