here's for sale the set of 550cc Power Enterprise side feed injectors.
phase2, but they come also with phase1/1.5 adapters, new sealings and also with matching caps to mount them
They're phase 2 injectors, pretty much straight fit. However they will require different connectors or original one modified - on connectors there are some sort of small plastic rails, on factory ones they're more to the top of connector, on Power Enterprise they're more to the bottom. If I'm not wrong some Nissan's have the same fittings - you can also ask in Roger Clark who sells those injectors if they can provide you with those connectors.
I have similar set on my type-r and btw - re: twinscroll topic - I can show you btw. how twinscroll setup behaves on type-r