I just put XXRS on my G37, 275/40/18s in the rear and 245/45/18s in the front. I havent done my shocks or springs yet and i want to lower the car but my rear tires stick out about a quarter inch past my fenders. is there anyone who knows of a shop on the south side of Georgia that can help me with this. I am tired of hearing my rear tires scrap everytime i hit a but at 80 miles an hour. Also any suggestions on if i should by drop springs or just change the whole set up?