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