ACDelco 171-637 GM Original Equipment Rear Disc Brake Pad Kit with Brake Pads, Clips, and Bolts Integrally molded - friction material molded to backing plate for bond integrity Premium shims, slots, and chamfers help to diminish noise, vibration, and braking harshness GM-recommended replacement part for your GM vehicles original factory component Manufactured to GM OE specification for fit, form, and function