So i came across a deal on some brand new vossens that i couldnt pass up. they are 19x11 +45 offset all the way around. I also have brand new BC coilovers ready to be installed. Lowered on coils, would a square 19x11 +45 setup work on a 13 G37 Sedan? Would fenders need to be rolled? If i am able to run this setup, what size tires are recommended? Any and all information is greatly appreciated.

 

I think the rear will be fine. The arches are rolled from factory.
your going to run into issues upfront with the knuckle. Youll need camber plus width and offset means no space inside and i think itll hit.
for reference here is 9.5 +38 with minimal knuckle cleance youd be about 21mm closer to knuckle than me. You could run a spacer to clear but at that width idk how far it would stick out. My advice test fit if possible.

 

Going to be rough to pull that off, like PNW_IPL mentioned, inner clearance at the upper section of the steering arm comes into play, his wheel is an 18 so they have less clearance at that area then 19s, but 11s w/ even more positive offset aren't going to work there. Running that set really requires wide fender kit or at the minimum a fender pull (which will look horrible unless done by a very experienced body tech).