Akebono ACT1337 ProACT Ultra-Premium Ceramic Rear Brake Pad Set For 2008-2010 Cadillac CTS Ultimate upgrade for OE semi-metallic, organic and low-metallic brake pads Ultra-Quiet - controls noise, vibration and harshness levels Superior initial effectiveness with no required break-in period Extremely rotor friendly for longer rotor life Vehicle optimized ceramic formula for superior performance