Axle-back and O2 sensors

Eris

Good day, everyone.

New z owner here planning to get an aftermarket axle back, making the Z finally sound beefy thus. Not wanting to do a full cat-back due to warranty and budget.

Few questions.

1. Is there any axle back that you recommend?

2. Would opting for a muffler delete instead be advisable (I know it'd be much louder, but I'm referring to performance issues)?

3. If I do change the stock muffler, will the O2 sensor go crazy with the fact that the system and the escape velocity of the gases are slightly faster, and thus will warning lights come on? Would I need to either "deceive" the sensor or get a remap for a new oxygen fuel mix (which I won't, given the warranty)?

I would suppose that an axle-back mod would be of rather minute effect to performance (which I dont care about, I just want better sound) that the ECU and sensor could easily compensate and have no troubles whatsoever regarding ratios and sensors, but I have no idea. Anyone here with experience regarding that?

4. Finally, kind of relating to the previous question... would there be a loss of low end torque with the mod (or any other sort of performance loss or issue) - as I'm sure we have all read about albeit with no real conclusion?

Thank you, kindly

Hope you all be having a great day.

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