The Corvette used was a completely stock coupe aside from the addition of racing seats and harnesses. It also featured the $2,995 ZTK Performance Package that includes the big rear wing, front splitter, Michelin Pilot Sport Cup 2 tires and custom suspension tuning. Not only that, but the car was also equipped with the eight-speed automatic, rather than the seven-speed manual transmission. All told, you'd have to spend $122,990 to buy a similarly equipped ZR1, plus the cost of seats and harnesses.
Chevy also was kind enough to record the lap for viewing pleasure. We've embedded it above so you can see and hear the V8 monster rip around the track.