This adaptor fitting allows you to adapt a fuel pressure gauge directly to the factory GM LS fuel rail. It screws into the end of the fuel rail (with the removal of the schrader valve) and converts it into a 1/8'' NPT for a gauge of your choice to screw into. It can also be used for other universal applications.

This adaptor fitting allows you to adapt a fuel pressure gauge directly to the factory GM LS fuel rail. It screws into the end of the fuel rail (with the removal of the schrader valve) and converts it into a 1/8'' NPT for a gauge of your choice to screw into. It can also be used for other universal applications.