they have outside face, otherwise any corner

Oh, that's great. It makes much more sense then.
So, you think I am safe with 18x9 ET40 OZ setup with KW CS' in terms of suspension clearance?

id say so but guessing

there are guys on here with CS and square so hopefully they will shout out

I believe some here are using non factory springs for the fronts on their CS because some require spacers and some don't. The front springs that were installed on the kit DID require 10mm spacers to clear OEM CSL wheels from hitting the suspension on my car.

BUT some members also say CS were straight plug and play. No spacers, no extra equipment. That's why I think it must be a different spring they changed later on OR ordered that way. Probably a shorter spring with same rate or something.