AP Racing 6 Piston Caliper -Light weight cast aluminum Fixed mount for minimal caliper flex -Differential Piston sizes (2x27/32/38mm) minimizes pad taper and maximizes even friction pressure -Anti Rattle springs reduce pad noise -Inner wiper and outer dust seals for everyday use AP Racing 332/343/355 x 35.5mm Rotors-Directionally Curve Vein Vented for maximum cooling -Cross Drilled and Slotted for aggressive pad bite and proper out-gassing -2 piece modular disc Brake Pad -Pad Area 76.3cm squared x 2 per caliper -Pad material designed for high performance road and track use -Consistent friction co-efficient at low and high temperatures