First of all, Yes i have performed a search, read alot, but i need more advice on this please. I am currently using a SAFC in a R33 manual with stock turbo and i want to eventualy upgrade to say something like a hks2535. After talking with Robo his advice was to go the power fc to get the best results which i fully agree with. But my question is if i already have the SAFC and try and source a SITC, will this combo have similar results as a power fc or be no where near as effective as a full ecu replacement. <_<