O2 spacers for catless downpipes

[travismelo3]

Hi, so I am going the catless downpipes with no tune route because of warranty and don’t want the CEL, so was thinking of doing 2 stacked o2 spacers on each downpipe and clearing the code if the cel does pop up. Should I be using the o2 spacers or not, because wouldn’t the car be able to adjust to the different o2 levels accordingly if they can get the best reading? I’m assuming it won’t be enough of a difference to matter if I do o2 spacers or not, but what do you all think? Thanks.