if i plan to get stage 3 kit will it still fit with the o2 housing sold at modern performance, bolt pattern difference etc

does anyone have any opinions. i don't understand why there are so many members on this site who can't answer a simple question. this forum is not very newb friendly.

I dont think Modern sells a stage 3 o2 housing . The stock o2 housing is a 4 bolt and the stage 3 is a 5 bolt

Stock 02 wont work w/ s3 02. You should be able to figure that out just by looking at the pics.
As far as people not answering your ?
Research is your friend.