hey i have an s13 with a rb20det and i am now looking for an ecu upgrade or piggyback system. I have looked around but i dont know what ecu can do what. i have a front mount, rb25 turbo, gtr fuel pump, full exhaust dump, splitfire coilpacks, ebc and just bought some gtr injectors but i understand you cant run them because of the different impedences. i dont feel like hacking up the loom, have heard you can get aftermarket ecu that with run them with out putting resisters in. have been lookin at the e management ultimate but it is a piggy back system, donno if its good or what? there are other brands like wolf, haltec or pfc but there is none around and they're dear. what you guys think? the car is used for drift, track and my daily cheers