[sideview_180sx]

for wideband I'd say the PLX or Zeitronix controller, if you use e-manage, since the PLX completely replaces the O2 sensor signal going to your ECU and gives you wideband readings while sending the ECU the fake signal as John stated. wireless and still able to tune. Im not bashing John's input about the Greddy Gold system. Just tossing other variables to use in conjunction with e-manage blue. Another point is to retard your timing(i think). Greg from Speed Alliance is on the greddy turbo kit, using e-manage with the display and controller.