EBC S4KR1135 Stage-4 Signature Brake Kit EBC Brakes S4KR1135 S4 Kits Redstuff and USR Rotor; Incl. Rotors and Pads; Rear; Rotor Dia. 11.5 in.; Authorized Dealer - 100% Satisfaction Guaranteed EBC Brakes S4KR1135 Warranty: Yes