I think the price difference between the 6 and 8 is smaller than the 8 to performance 8, just because most people don't customize their vehicle to get the extra push or hp but they'll pay more because they know what their getting. It's like cornering the market really. Why pay a boat load for a gt500 when you can just spend 7grand for a super-charger and you have one. Because people think it's some kind of hassle or risk, if you ask me. The auto industry brain-washes people.