But none of those Z07-equipped Corvettes have been tested on the MPSC tires. I'm not talking about production. I'm talking about actual sales. So you're telling me all those people who buy Panameras and Cayennes actually give a shit about Porsche's racing history? It has nothing to do with the feeling that, when you get inside a Porsche, it doesn't feel like they've cut corners anywhere in quality and design? I'll bet it does. Uh, they may both have been built to run laps around a track, but what I'm getting at is where is the priority. Clearly one car is built with track laps in mind over all the other things that make a car (luxury, amenities, subjective feel, etc); we might even include durability in that if other MPSC-shod Corvette exhibit the same brake fade. If lap times don't increase sales, then what does? GT2 also costs 2x's as much and the RS is purposefully limited to 500 units. Turbo seats are handy, but I rarely see them ever being used, even by small kids. I don't think that's the reason. Clearly, if you can afford a Turbo, you can afford a ZR1 *and* a pretty nice sedan. CF vs aluminum...that's a lot of "ifs." The simple fact is, starting over from scratch on the body is a huge deal. It doesn't make any sense that they budgeted this back in 2000 or whatever when they started. This HAD to have involved considerable cost, and it no doubt delayed the final product. Point being, this is not a model that has had the luxury of constant refinement over 5 decades that the Corvette has had. You are right, two very different cars with very different goals. If one is impressive in its lap time, then so is the other.