G'Day, I am new to Turbos and I just have a question regarding water injection and intercoolers. What are the difference between them and how do they effect the turbo? I have ben looking at some kits and they have listed water injection as an extra or a intercooler as an extra. I was trying to get the Busa to run at about 260-280hp on pump fuel. Also not too sure what engine mods i will need to do to run this hp. Any information on any of these questions is appreciated.