Centric 105.121 Posi-Quiet Ceramic Brake Pad with Shims Extreme pressure compresses the friction material creating a more consistent material density throughout the pad This process utilized by O.E. suppliers is the most advanced available today Precision cut or shaved backing plates reduce vibration and noise by ensuring proper fit in the caliper, correct fitment results in even pad wear and consistent braking power throughout the lifetime of the brake pad All Posi Quiet brake pads feature mechanically attached, application specific shims, these shims provide superior noise abatement compared to lesser adhesive or drift-lock style shims Stable friction performance across wide temperature range