The 034Motorsport Billet Aluminum Dogbone Mount Insert for early (up to 2008.5) MkV Volkswagen Golf/Jetta/GTI/GLI/R32 & 8J/8P Audi TT/A3 is precisely machined to fill the large voids in the factory dogbone mount, and limit transmission movement without sacrificing ride quality or introducing perceivable noise, vibration, or harshness into the cabin. By filling the voids in the factory mount, this insert eliminates the associated slop to ensure that you experience crisper shifts and a smoother driving experience.