Wilwood Forged Dynalite Big Brake FDLI Pro-Series Park Brake Kit for Impala 59-64 / Corvette 57-62

This Wilwood Big Brake FDLI Pro-Series Park Brake Kit provides a complete rear disc conversion for 1959–1964 Chevrolet Impala and 1957–1962 Chevrolet Corvette rear axles. The kit replaces the factory drum system with a modern disc setup featuring forged Dynalite four-piston calipers, a 12.19-inch vented rotor, and high-friction BP-10 compound pads. The integrated internal shoe-style parking brake supports clean installation and static holding power. With direct bolt-on compatibility and precision-machined parts, the system is built to deliver consistent braking and upgrade the performance of classic rear-wheel-drive vehicles.
The calipers are made from forged billet aluminum and offered in standard or optional red finishes. The rotor is a one-piece vented design and can be ordered as a standard ULHP version or as an SRP drilled and slotted rotor with black coating for improved cooling and pad engagement. All mounting hardware is included, and fasteners are treated with red Loctite® 271 for durability. This kit is designed to function with upgraded 1/2-inch wheel studs and is centered using shims to match the axle flange spacing for proper caliper alignment.

KEY SPECIFICATIONS

- Rotor Diameter: 12.19 inches
- Rotor Thickness: 0.81 inches
- Offset: 2.46 inches
- Axle Register Diameter: 2.82 inches
- Max Axle Flange Diameter: 6.61 inches (with 0.050" x 45° chamfer)
- Calipers: Forged Dynalite 4-piston
- Pads: BP-10 high-friction compound
- Wheel Studs: Requires 1/2" diameter studs (not compatible with OEM 7/16")
- Rear Axle Fitment: 1959–1964 Chevy Impala, 1957–1962 Chevy Corvette


INSTALLATION OVERVIEW

This kit mounts directly to the rear axle housing flange and is intended for use with classic Chevrolet models that retain OEM axle geometry. Begin by verifying that the axle register, flange diameter, and offset match the specifications provided. Install the rotor onto the hub using the included hardware and rotor registration components. Align the caliper using shim packs to achieve even spacing around the rotor. Some modification to the OEM bearing retainer may be necessary to allow clearance for the internal parking brake. The system requires 1/2-inch wheel studs, and smaller factory studs must be upgraded before installation. Hydraulic lines, fittings, and parking brake cables are not included and must be sourced separately. After mounting, follow a sequential brake bleeding procedure to remove air from the lines and achieve consistent pedal feel.

FITMENT AND COMPATIBILITY

This brake kit is a bolt-on upgrade for 1959–1964 Chevrolet Impala and 1957–1962 Chevrolet Corvette rear axles. It is designed to work with stock-style axle flanges but may require trimming or replacement of the OEM bearing retainer to prevent contact with the internal parking brake assembly. The rotors are pre-drilled for 1/2-inch studs, so vehicles using smaller 7/16-inch studs must be upgraded. Brake hose compatibility should also be reviewed, as Wilwood calipers use a 1/8-27 NPT inlet, which may not be compatible with factory rubber lines without an adapter.