Its gonna be close if you do any lowering. I'd definitely run a 205/40 and be prepared to maybe do a tiny bit of rear fender roll. If you don't mind rolling a 215/40 would be a better choice of size due to selection.
Depends on how wide the wheel is. If its a 18x7 +33 your not gonna have much problem with a 205/40 18 tire but you may have a tiny rub in the rear. It would be close.