Turbo Saver fittings

[TType85]

I have a PTE turbo saver on the car and am getting a new DBB turbo from them. Patrick told me I need to use a -4 line instead of the -6 that I have. Does anyone know what size the fitting is on the turbo saver itself? I know I need a 1/8 npt to -4 for the turbo, just not sure what is on the other end. Could I just get a -6 to -4 reducer?

Thanks