The Wilwood D31 rear brake kit for 1984–1989 Porsche 911 is supplied with 11.42in rotors and flex lines, finished in red. Designed for the rear axle of those model years, the kit bundles the rotor diameter and required hydraulic line hardware to provide a direct-fit rear-axle replacement or braking upgrade for period 911 vehicles where those dimensions are applicable.
Wilwood 84-89 Porsche 911 D31 11.42in. Rear Brake Kit w/ Flex Lines - Red