Specific cable set for upgrading the Audi original accessory exhaust system "Sound Package" with part number 8T0 071 901 B for Audi A4 8K, A5 8T Cable set is not available from Audi spare parts service Existing connections for control unit, left/right rear silencer, power supply, CAN bus Scope of delivery: Specific cable set Note: Suitable sound amplifier: item number 40186