The Wilwood combination hydro-mechanical parking brake caliper kit for 2003–2008 Audi A4 replaces rear units with a caliper that uses hydraulic pressure for stopping and an internal mechanical lock for parking. Paired with oversized two-piece rotors with aluminum hats and BP-10 compound pads, the CPB kit restores balanced braking performance while matching the style of front big brake upgrades for compatible front-wheel-drive and select rear-wheel-drive axles.
Wilwood 03-08 Audi A4 Caliper-Combination Parking Brake Rear 12.19 Rotor - Red