Big Brake Kit The Wilwood 08-12 Audi A4 Front Kit A5 S5 AERO6 Big Brake Kit is a performance upgrade kit designed to give your Audi A4, A5 or S5 a higher level of braking performance. This kit includes Wilwood's AERO6 Big Brake Kit, consisting of 14 rotors, 6-piston calipers, and high-performance brake pads. This kit also includes Wilwood's billet aluminum hubs and stainless-steel braided brake lines. This kit is designed to provide improved braking performance and increased stopping power for your Audi.