Fits to Audi A3 8P 3D 2003 - 2013, subwoofer 8"/20cm, volume 8 liters
Fits to Audi A3 8P Sportback 5D 2004 - 2013, subwoofer 8"/20cm, volume 8 liters
Fits to Audi A4 B6/B7 Avant 2001 - 2008, subwoofer 10"/25cm, volume 15 liters
Fits to Audi A4 B8 Avant 2008 - 2015, subwoofer 10"/25cm, volume 15 liters
Fits to Audi A4 B9 Sedan 2015 -, subwoofer 10"/25cm, volume 15 liters