This innovative; advanced friction product is engineered to meet the exacting needs of professional technicians and demanding applications. PQ PRO Disc Brake Pads combine customer-driven brake friction capabilities with cutting-edge materials to address key service issues â brake fade; weak braking response; excessive noise and high temperatures. PQ PRO Disc Brake Pads fuse Centric Partsâ legendary first-to-market brake friction research and development with innovative; proven fabrication processes. PQ PRO brake pads are manufactured using the positive molding process utilized by original equipment suppliers. Our Opti-Check Early Warning System gives you clear visual indication of pad service life; and every set is backed by a One-Year Centric Assured Roadside Assistance Guarantee.