Well I called Rc Eng and they said that the 500cc would be to big for the AFC to handle, going from 250 stock to 500 was more then a %50 change. SO I asked some othere people and I belive someone said 550 were teh max teh AFC could handle in our cars. So my q's is who here other then Chris M have the AFC and bigger injectors?? I plan on ordering all this stuf here this Fri and was going to upgrade to stage 3 but figured why spend extra cash on the fuel controller when I have the AFC but if I can't run 440cc which now I'm hearing I can't either, but sure I can, then I might as well fork out teh extra cash for the 500 and HRC fuel module. ANy suggestions, Ideas, something.....