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IDK if other tuners like the popular SCT tuner can do that. I purchased hp tuners non-pro version to do as you said. You will want them to leave the front o2's functional and disable error notifications on the rear o2's. The rear o2's can physically remain in the system or not. The fronts need to mounted properly. Some people have had to mount an extension in the wires and or tubing to keep them working properly. I did not.
Smog check is a different story. Also I think when you reflash smog systems go back to not ready status. Evap system etc. They can be very difficult to get them to self check as "ok" "ready" again. It won't throw a check engine light as they are not ready but you won't pass smog.
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