AN fitting sizes for the engine block?

my turbo setup didn’t come with the adapter fittings for the block. i know the coolant feed is -6 AN M14x1.5mm. what i’m not sure about is the oil feed, aside from it being -4 AN. so is it -4 AN M12x1.25mm OR -4 AN M10x1.25mm?

quick help would be GREATLY appreciated. thanks.

  • jesse