Looking for a bit more info on this. More geared toward the legality and emissions and all that huh-bub surrounding this mod.

I tuned my GSX via ecuflash and instead of learning another way of doing it figured I'd throw a spare flashable ecu in the 1g make it more modern I know all I need is a jumper cable to wire it up and a 2g knock sensor.

(http://www.dsmtuners.com/forums/tun...3-2g-flashable-ecu-1g-patch-harness.html
http://www.dsmtuners.com/forums/electrical-tech/418334-2g-ecu-1g-wiring.html)

Plus it would make tuning easy since it's already running a 2g maf/2g intake manifold etc.

How will this affect my testing results for codes and pass? Anything to worry about? I'm pretty mind set on doing it but want to make sure it won't become a headache at the testers.

Let me know, would appreciate anything you can input.