the stock afm can do 200rwkw so can the injectors and ecu. mine has been running 200kw for a while without any stress, havin a high flow means you can get more air at lower boost levels. so you might make 200kw on 8-9psi, where I have to run 12-13psi (just as an example) this also means that you'll max things out with less boost too. I have a mate who before his rb25/30 build was making 235kw with stock injectors and afm, so I don't think that is whats holding you back! but I'm no pro haha