These pads are made from a specially designed softer compound which gives a longer lifetime as well as improved pedal feel at lower speeds. USR Slotted Upgrade Brake Rotor. Sold in pairs for front or rear fitment. Wider aperture grooves dispel gasses and debris. Manufactured from unique rotor alloys. Slot pattern gives quiet braking. Thermic black coated for maximum corrosion resistance. Inspected for runout. These rotors are made from special rotor alloys which are unique to EBC Brakes. Rotors are precision machined by EBC Brakes with a slot pattern that gives quiet braking.