PIII GR Corolla Brake Cooling KitPIII GR Corolla Brake Cooling System The PIII GR Corolla Brake Cooling System has been developed for drivers who want to push their Toyota GR Corolla harder, whether on fast road, mountain driving or track days. The OEM braking system is capable, but once the car is used repeatedly at higher speeds and higher brake temperatures, its limits become clear. Brake bite can become less consistent, pads wear faster, and disc temperatures can rise to the