Professional technicians prefer evolution ceramic pads for problem free installations and no come-backs. Power Stop brake pads are engineered for noise free braking with dual rubber backed shims that offer 6 times more noise reduction than plain steel shims. The pad surfaces are thermal scorched for fast break-in. Evolution pads feature a true ceramic formula that keeps wheels cleaner and won't wear-out the rotors. Power Stop pads have 20 percent more stopping power. The premium carbon-ceramic compound is made using OE positive mold technology, that assures a uniform friction density throughout the pad and this helps control noise and premature wear. Evolution pads are manufactured under TS16949 standards to OEM specifications including chamfers and slots.