Ultima | Rear Brake Disc Rotor (Single Left) | HSV VZ AP 4 Piston Caliper 2005–2006 | AAP2019SLUltima Rear Brake Disc Rotor (Single Left Hand) for HSV VZ (11 2005 2006) AP 4 Piston Caliper This Ultima Rear Brake Disc Rotor (AAP2019SL) is a crucial component for the high performance braking system of the HSV VZ models, specifically those manufactured from late 2005 to 2006 that are equipped with the upgraded AP 4 Piston Rear Calipers. This OE quality rotor is built to handle extreme thermal loads, ensuring stable and consistent braking