I thought the same at one point. The mag ride on the Z06 and Z07 are the exact same shock. It's programming and slight adjustments that only give you 8% stiffer shocks with Z07. I can buy the Sport Cup 2R tires but don't like them as our roads don't heat up enough. Ceramic brakes you can order without Z07 which I did. Aero you can order with non Z07 anyway. I was scared away from CF rims. GM rep told me I can't simply switch rims back and forth from CF to other metal rims as the cars ABS and other suspension components are set for the 40lb lighter rims. At the end of the day we don't really have a track in my area for the Z07 and I just wanted the car.