Antenna modules for Audi TT 8J The cable set is required to ensure optimum radio reception when retrofitting a radio navigation system. In addition, there is no fault memory entry. Learn more about antennas Selectable options: Audi TT 8J Coupé Audi TT 8J Roadster Scope of delivery: Antenna cables Note: Conversion from navigation to radio on request Antenna modules are also required