I have a friend who has a s13 swapped to a red top sr20. We just got done putting some Subaru wrx sti 520cc injectors in. From what i can tell is they fit directly into his fuel rail. No adapters needed, We had to swap the plugs to fit the injectors. Correct me if I'm wrong but can't we do that. Especially with all the adapter kits available for the older plenum's. Also i was looking on z1's web site, they are selling a kit of 550cc injectors with adapter kit. The injectors are made by Jecs. A little more looking around and guess what. That same injector is also available for the wrx sti. I know that subaru use's both top and side feed. I'm talking about the yellow top side feed injectors. They came stock on 04-07 sti's i think. I searched for a while and all the post that i found was pre adapter's and such. If any one has thought of or done this post a little know how about it.
