The EBC S4 kit pairs S4-grade brake pads with USR slotted rotors as a matched upgrade package. Marketed for street use, these kits include OE-style noise-reducing shims on the pads and precision-machined slotted rotors with thermic black coating for corrosion resistance. Sold as paired sets, they are intended to replace both pads and rotors together for improved brake surface management.
EBC S4 Brake Pad and Rotor Kit