These billet aluminum inserts are designed to fill the voids in the factory B6/B7 Audi A4/S4/RS4 rear differential carrier mounts, and limit rear differential movement without sacrificing ride quality or introducing any additional noise, vibration, or harshness into the cabin. By filling the voids in the factory mounts, this insert eliminate the associated slop and ensures that you're experiencing smoother shifting and throttle transitions, and an improved driving experience.
Installation is very simple, can be performed in minutes, and is completely reversible.
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