In this picture from Cobb Tuning, they show the dramatic difference in width between their AIT widebody Nissan GT-R compared to a stock Nissan GT-R. The stock GT-R is already a pretty large and wide car at 74.9 inches. Their Time Attack car hasn't run in the last year or so. Its out in Texas now, perhaps we might see it at some upcoming events? Last time it was out, it did pretty well.