Looking to purchase new wheels for my S , but I'm not looking to roll my fenders , the wheels specs are 18x8.5 +48 front and 18x9.5 +45 rear or 18x8.5 +45 rears the car might be dropped on coils and I don't mind the stretch tire look . Need your help with what tire sizes I can use with no rubbing issue without messing around with the camber

 

Not possible on those sizes. You need to be above +60 to not run any camber and not touch the fenders. Also even if you did that you would probably need to roll the fronts if you are lowering. Even if you stretch tires on those you would still need a good deal of camber and no matter what the front fenders would be in danger when the car is lowered.

On the other hand if you just rolled the fenders you could easily run a 245 front and 255 rear with those wheel specs and a little bit of camber.