Wilwood Black SRP Rear Parking Brake Conversion for Chevrolet/Oldsmobile/Pontiac/Buick Chevelle/442/Beaumont/Camaro/Apollo (1964–1974), Staggered Chevy 12-Bolt

Black floating calipers and drilled/slotted 12.19-inch rotors identify this Wilwood rear package for a staggered-shock Chevrolet 12-bolt housing. Internal shoes provide parking-brake actuation. It is configured around original C-clip axle retention and the specified 2.75/2.81-inch offset options, with the actual rear-end measurements governing selection rather than front-spindle equipment listed for a vehicle. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings, and brake lines for motorsport, street-performance, and specialized applications.

Technical Details

• Manufacturer part number: 140-12570-D
• Type: D154 Rear Parking Brake Kit
• Calipers: D154; 2 pistons per caliper; Black Powder Coat.
• Caliper bore sizes: 1.12, 1.12 inches. Piston type: Stainless.
• Included pad compound: BP-10.
• Rotors: 12.19-inch diameter × 0.81-inch thickness; SRP Drilled & Slotted; Iron; Black Electro Coat surface; 32 vanes.
• Rear housing end: 12 Bolt.
• Required axle flange offset: 2.75 - 2.81 inches.
• Bolt pattern: 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm; 5 x 5 in; 5 x 127 mm.
• Included: paired calipers, pads, rotors, mounting brackets and assembly hardware, internal parking-brake shoe assemblies.
• Hydraulic lines and fittings selected separately. No master cylinder, booster or spindles are supplied.
• Parking-brake cables, clevis hardware and adapters are separate.
• Conditional wheel screening size: 16 inches. Use the installation clearance diagram to verify the actual barrel and spoke profile.
• Axle-flange limit: 6.61-inch maximum diameter with the specified 0.050-inch × 45-degree chamfer. The drawing is for half-inch wheel studs and recommends upgrading smaller original studs; verify any larger-stud machining separately.

Fitment & Compatibility

Confirm the original axle retention and flange layout against DS925. The right caliper mounts toward the rear and the left toward the front to accommodate staggered shocks; both belong to the rear axle. Compare wheel barrel and spoke clearance with the template. Hydraulic connections and parking-cable hardware are selected separately, and the preserved model applications must be confirmed against this specific rear housing arrangement.

Match the individual model, year, submodel and brake configuration in the fitment table below.

Wilwood installation documents: Installation instructions; Technical bulletin.

PMB Performance has over 20 years of brake-system experience. Contact us with your vehicle details and installed brake hardware for help confirming the correct arrangement.

California Proposition 65 warning, brake pads only: WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.