2013 with Moriwaki 4 into 4

[Houtman_imp]

Last week I received two O2 sensor eliminators from England with the plan to put them on my 2017 and see how the bike would run without O2 sensors before ordering a 4 into 4 exhaust system.
However thinking how much of symmetrical person I am , I thought perhaps I should look for a 4 into 4 on my 2013.
I could give up the center stand as I have rear stands for tire/chain work and I had sports bikes before without a center stand.
With some 4 into 4 system you can still use the O2 sensors and no need for pair valve work. Does any has a Moriwaki 4 into 4 on a 2013 AND left everything else intact and no mapping/flashing needed ?
I will also contact Mr. T. for more info on this exhaust or the Wyvern.