This is the bracket for disc brake cars, holds the disc brake valve below the cylinder. The valve bolts to the bracket and the bracket mounts to the 2 studs of the brake booster. The bracket installs over the cylinder. No disc brake company provides this bracket in the kit. These are very difficult to find, and this is exact to NOS in every detail. is rusty on every car. This bracket is also good if you want to convert your 70 with all three valves down to the 1 piece valve from 1971. This is the bracket for the conversion.