Apexi Power FCThe Apexi PowerFC is a complete ECU replacement for a large number of vehicles. It is recommended by a lot of mechanics and tuners for modified Japanese import cars in Australia, due to its ease of use, cost and easy ability to obtain. I have this ECU on my Skyline and in the hands of a great tuner it really works wonders, the difference really has to be experienced. I cannot recommend a good ECU and tune enough, even for a stock vehicle, it would definitely be my number one modification.

You can get more information from these sites:
Apexi PowerFC at Nengun Performance
Apexi PowerFC FAQ