Ceramic, Semi-Metallic, and Organic formulas provide safety and reliability for a range of vehicle applications Basic shims, slots, and chamfers help to diminish noise, vibration, and braking harshness No curing or machining required, ready to be installed right out of the box Some ACDelco Silver parts may have formerly appeared as ACDelco Advantage Economical value with dependable quality For General Motors vehicles as well as most makes and models