13.31" x1.02" (338mm x 26mm) Heavy Duty, 72 Vane, D47, J Hook Racing Brake Disc (rear pair)
Compared to previous generations of Corvettes, GM definitely took a step forward with the brake design on the C7 Stingray platform. That said, the brake components were still designed primarily with road manners in mind. As you'll see below, there is a considerable amount of room for improvement if you plan to run your car hard on the racetrack.
The OEM Stingray Z51 discs have a few major impediments that prevent them from working optimally on a racetrack:
A proper racing disc design differs considerably from the OEM Z51 disc design, and will operate with far more efficiency in a racetrack environment. Despite having the same overall dimensions as the OEM Z51 discs, AP Racing's Heavy Duty J Hook Discs provide superior cooling, less judder, fewer cracks, and an increased service life vs. OEM and competing discs of comparable size. AP Racing J Hook discs are the epitome of endurance racing components, and have been proven time and again in professional racing, winning many races and championships (ALMS, Rolex, Grand Am, etc.). They will certainly stand up to any abuse that you throw at them.