SHARING its highly competent braking system with the 911 Turbo and GT2 models, the C4S features larger four-piston fixed monobloc aluminium brake callipers both front and rear - painted red. They work with larger cross-drilled and internally ventilated brake rotors on all four corners, the front units now measuring 330mm x 34mm and the rears 330mm x 28mm. For the C4S, engine mounts and front axle pivot bearings were optimised for good brake ventilation, while ceramic brakes will soon become an option for C4S, as it is with the Turbo. Of course, dual-circuit ABS is standard - as is PSM, ASR and ABD - and there are brake pad wear sensors.