Wilwood Red Rear D154 Plain-Rotor Conversion, Staggered-Shock Chevy 12-Bolt C-Clip End, Apollo/Camaro/Beaumont/442/Chevelle (1964–1974), Parking Shoes

Plain-face rotors and red D154 calipers form this Wilwood rear disc conversion for the specified staggered-shock Chevrolet 12-bolt housing. Internal parking shoes supply the mechanical brake, while two-piston floating calipers handle hydraulic service braking. The 2.75/2.81-inch mounting options require measured axle offset and original C-clip retention; neither vehicle model nor front-spindle choice is sufficient on its own. 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-R
• 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; Plain Face; Iron; Plain 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

Compare flange spacing and the bearing/register with DS925. Right-side rearward and left-side forward caliper mounting allow shock clearance within the rear axle package. Confirm the individual vehicle application and exact offset before ordering. Hydraulic hoses, parking cables and connection hardware are separate. Use the full wheel diagram to assess spoke depth and barrel clearance, then verify cable travel and front/rear hydraulic balance.

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.