The 034Motorsport Billet Aluminum Dogbone Mount Insert for 2009+ MkV/MkVI Volkswagen Golf/Jetta/GTI/GLI & 8J/8P Audi TT/A3 is designed to fill the large void in the factory dogbone mount, and limit transmission movement without sacrificing ride quality or introducing excessive additional noise, vibration, or harshness into the cabin. By filling the void in the factory mount, this insert eliminates the associated slop to ensure that you experience crisper shifts and a smoother driving experience.