I agree that 4 18x8's would not look as good as stock. I just recently asked the same question and got nothing but don't do it advice. Even the service tech at my Nissan dealer said no way. As some suggested, go with 18x9 AND 18X10's if keeping the same tires. 18x8's in frt and 18x9's in the rear are the specs for your stock wheels, so dont go narrower for the rear. You get some great advice here. I learned a lot here.Rich