This is the EBC Brakes S4 Rear Brake Kit that includes a set of USR Series Sport Slotted Rear Brake Rotors, and a set of Redstuff Ceramic Rear Brake Pads.
The USR Series Sport Slotted Rear Brake Rotors are a high-performance oriented brake rotor that is precision machined from high-grade gray iron to exacting standards where they undergo extensive testing and arduous quality control before getting approval for consumer acquisition. If you have a vehicle that makes a considerable amount of power, then slotted rotors improve braking performance as the slots in the design wipe the face of the rotor clean to expel brake residue and hot gasses generated from the pad to produce efficient braking at all times.
Combined with Redstuff Ceramic Pads, you will have significant braking improvement over your OEM system. The Redstuff pads deliver 15% better braking performance when compared to the OEM pads and feature a low dust count, and they are capable of repeated heavy brake use without brake "fall off". These pads also feature EBC's red "brake in" surface coating for instant safe braking once installation is complete.
Sold as a complete kit for the rear location.