Wilwood Red D154 Rear Kit, SRP Rotors, Staggered 12-Bolt Parking Brakes, Chevrolet/Oldsmobile/Pontiac/Buick Chevelle/442/Beaumont/Camaro/Apollo (1964–1974)

Wilwood's red D154 conversion pairs drilled/slotted 12.19-inch rotors with internal parking shoes for the specified staggered-shock rear axle. The floating service calipers use two pistons each and mount fore/aft on opposite sides. The Chevrolet 12-bolt flange, original C-clip retention and 2.75- or 2.81-inch offset must all be verified before treating a listed vehicle as a suitable installation. 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-DR
• Type: D154 Rear Parking Brake Kit
• Calipers: D154; 2 pistons per caliper; Red 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

Match the rear housing dimensions with DS925, including bearing/register size and offset. Caliper clocking places the right side behind the axle and the left side ahead of it for shock clearance. Front-spindle options do not establish this rear fit. Select hydraulic hoses and parking cables separately, then compare the actual wheel profile with the caliper outline and confirm the complete hydraulic and mechanical parking systems.

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.