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