. EBC for Audi S4 Supercharged USR Slotted Front Rotors - ebcUSR ; Quantity. Deep cryogenic treatment is a one-time process that permanently improves the performance and wear characteristics of metal components, from brake rotors and. Read more. Lexus IS-F. Built to last. 4 available ; Item Number. ebcUSR The unique slotting aids with heat and brake dust dispersal, prevents glazing of the pads, adds bite and improves wet and dry braking performance. ; Other Part Number. Manufacturer'sWarranty. Black Thermic coating leaves a nice finish and protects the rotors against corrosion. Precision slotted screwdriver made of chrome-molybdenum-vanadium steel. Forced Induction. Tuning & Gauges. A handle made of nylon plastic with a fast-turning TPR anti-slip top. Pro'skit SDS4 Non-magnetic Precision Ceramics Driver Slotted Screwdriver Tool With Blade. StopTech Audi S4 SportStop Cryo Slotted & Drilled Front Right Rotor StopTech Sport Rotors are also available with an optional cryogenic treatment.