I get what ya'll are saying now. So say I decide to buy the Nismo 740cc injectors if they'll be the same price as brand new OEM 370cc injectors. I don't want to upgrade my ECU right now and don't really have the need to because I don't have any power mods that boost my HP. Can I just pop the 740cc Nismos inside my current fuel rail with the adapter kit and run it with my existing ECU? Is that going to affect my fuel economy at all using 740cc injectors without an ECU upgrade? I understand that my injectors have a higher flow rate, but if the ECU is running them as if they were 370cc would that matter? If that is the case, I am seriously considering buying the Nismos and doing this all myself when I am on break from school.