i took my ecu to xat. they told me that the ecu has to be sent to somebody to solder it to put a chip in it and then xat programs it. my program was:

z32 maf
gt2871r .68 a/r
brian crower stage 2 cams
72# injectors

i brought the resistors to xat thinking that it goes into the ecu but they said that it goes on the injector wires. i needed a base map for this setting because i have to break in the car and then take it to the dyno.