Description: Suspension Top Hat. Strut Mount C0U4. Insulator between the strut and vehicle body Fits Legacy Suspension Shock or Strut Mount Strut mounts or strut bearings are often service w/ the strut Assembly, and when they fail they can make a squeaking noise while turning or a Metallic clunk noise when going over bumps. If your Subaru is noisier than usual on bumpy roads or under braking, you may need new strut mounts. Sedan. Legacy/Outback. w/ spec b Model. w/ gt limited spec b.