AERO4 WCCB Carbon-Ceramic Rotor Rear Brake Kits offer an extreme performance upgrade featuring WCCB Carbon-Ceramic Dynamic Mount Rotors with Wilwood’s exclusive Bobbin Mounting System. AERO4 WCCB kits are engineered to maximize braking capacity inside custom wheels. Rear parking brake kits offer a simple bolt-on installation and are fully compatible with ABS and OE master cylinder output. AERO4 calipers are a competition proven and offer fully detail machined forged caliper body demonstrates superior strength and resistance to deflection and separation under high load. 14.00†WCCB rotors are made from a proprietary blend ceramic matrix composite material commonly known as Carbon-Ceramic and dynamically using Wilwood’s proprietary integrated anti-rattle Bobbin Mounting System. WCCB rotors offer higher thermal conductivity and heat capacity in excess of conventional iron or titanium rotors of similar or even greater weight and have been developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking and wear.