square staggered

Hi all, I think I've done too much reading and completely confused myself on this topic. I'm trying to understand what I need to to do to get to a square setup on my Z4C. I have Style 108s, which I understand are ET47 front / ET50 rear, which, if I'm not mistaken, means they will always be...

Evening, everyone... I searched the forums and the internet for this and came up with nothing, which means the first poster will send me a link to the info that was right under my nose... Looking at tire sellers and the forums and the owners manual, it seems that Z3s could come with staggered...