If you start with a base Z06, the Carbon package brings the total to $91,030. A 2012 Nissan GT-R starts at $89,950. That's an irrelevant difference in this price range. Realistically speaking, you don't need the Carbon package either. The only "performance" enhancements are a carbon fiber hood, rockers and splitter, the rest are cosmetic changes. Seriously, how much is the weight savings from that really affecting performance? If you skip the Carbon package and just get the Z07 performance package you save about $6000, cutting the price to $84,200. That's a decent $5,500 cheaper than the GT-R.