Serious Street Systems come with 11-inch diameter, "Eradispeed" rotors that are directionally ventilated with curved vanes. Rotor surfaces are reverse-slotted, cross-drilled, and zinc coated. Hubs are pre-assembled with Timken bearings and races, packed in Redline synthetic grease, and protected by National grease seals. PBR high performance, two-piston calipers are fitted with high metallic pads, just like the OE systems on ZR1 Corvettes. The necessary brackets, braided steel, Teflon-lined hoses, master cylinder, and hardware are also supplied.