ACDelco Professional Semi-Metallic Disc Brake Pads are formulated with steel strands to provide strength and conduct heat away from the rotorâ€™s surface while offering premium braking power. They are the high quality replacement ideal for many vehicles on the road today. Noise-dampening shims are included where applicable. Also, no curing is required. Independently tested using SAE J2784 standards, these pads deliver the fit, form, and function you expect from ACDelco. ACDelco Professional Semi-Metallic Brake Pads are ready to be installed right out of the box. Warning: Automobile parts, accessories and ancillary chemicals contain chemicals known to the state of California to cause cancer, birth defects and other reproductive harm. Wash hands after using.