Power Stop (16-1647) Z16 Evolution Clean Ride Brake Pads, Rear Engineered for noise free braking with dual rubber backed shims; offers 6 times more noise reduction than plain steel shims Premium ceramic compound is made using OE positive mold technology - assures a uniform friction density throughout the pad and this helps control noise and premature wear Evolution pads feature a true ceramic formula that keeps wheels cleaner, and won't wear-out the rotors Manufactured under TS16949 standards to OEM specifications including chamfers and slots Pad surfaces are thermal scorched for fast break-in