Just so you know your sig doesn't show up. As far as the ported lower intake goes I never had one or never have installed a W2A IC (water to air). But from what I have read to get the most out of one you want to have your lower intake ported and your s/c ported for an IC. Which at the very least involves removing the "wall" on the outlet side. What brand and version IC do you have. Because I know the zzp ones need to have the ported lower intakes to keep the pcv function function able. You should be fine with your stock injectors down to a 3.1 pulley but you should do something like a fuel pump rewire. But also how far you can push your stock injectors also depends on the condition of your fuel system, like the pump, and filter.
HTH
