I've upgraded to Siemens 680cc low impedance injectors. I know that the stock 440cc injectors are low impedance and supposedly the 680's are a direct replacement.
Having said that, my "tuner"....who is primarily a Honda guy, tells me I need a resistor pack with low impedance injectors. I'm guessing there must already be a resistor pack in the wiring already? I have gone to an AEM Plug and Play EMS...does that factor into it?