Wilwood Front Kit for Estate Wagon/LeSabre/Skylark/Camaro/Caprice/Impala/Nova/Custom Cruiser/Delta 88/Omega/Bonneville/Catalina/Firebird/Phoenix/Parisienne (1979–1990): Red Six-Piston Dynapro Calipers, Hubs and Drilled/Slotted 12.19-Inch Rotors

Red Dynapro calipers and drilled/slotted rotor faces identify this six-piston Wilwood front conversion for supported GM cars. Its 12.19-inch rotors bolt to the replacement hubs, while the mounting brackets attach to correctly prepared factory disc spindles. The kit is intended for the original 11-inch-rotor spindle arrangement; a modified vehicle requires direct comparison with the installation drawing. 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: 140-12836-DR
• Type: Forged Dynapro 6 Big Brake Front Brake Kit (Hub).
• Calipers: Dynapro 6; 6-piston; Red Powder Coat.
• Piston bore dimensions: 1.62, 1.38, 1.38 inches; stainless pistons. Caliper mounting: lug.
• Included pad compound: BP-10.
• Rotors: 12.19-inch outside diameter × 0.81-inch width; SRP Drilled & Slotted; Iron; Black Electro Coat surface finish.
• Rotor ventilation: 32 vanes.
• Wheel-mounting change from OE: -0.10 inch per side.
• Replacement hubs: Hub - Vented Rotor Offset; Aluminum; Bare.
• Wheel bolt circles: 5 x 4.50; 5 x 4.75 inches.
• Included: paired calipers, pads, rotors and mounting hardware, caliper mounting brackets, replacement hubs and bearing hardware.
• Hydraulic flex lines are separate; select the correct fittings, length and route for the vehicle.
• Conditional wheel minimum: 15 inches. Compare the complete wheel-clearance diagram with both barrel and spoke dimensions.
• Required spindle preparation: substantial steering-arm/spindle modification includes drilling, tapping and removal of interfering ears. Follow the exact installation drawing; Wilwood recommends a qualified machine shop.
• Conditional wheel support: if the wheel contact face overhangs the new hub, the separately sold 6.60-inch-diameter × 0.20-inch-thick steel support spacer specified in the linked installation instructions is required. Check full seating before assembly. For stamped steel wheels without overhang, Wilwood recommends a separate 6.15-inch-diameter × 0.09-inch-thick hub shield.

Fitment & Compatibility

Check model-year and spindle notes independently, especially where a car has received replacement suspension components. Required spindle modifications are part of this conversion, rather than an optional clearance adjustment. Inspect wheel bearing fit and the rotor mounting face before bracket alignment. Wheel position moves inward 0.10 inch per side, which may affect existing tire clearance. Use the template to evaluate the wheel's interior and source suitable hydraulic hoses separately. Confirm pedal travel and brake balance with the rear brake system.

Match the individual year, model, submodel and equipment conditions in the fitment table below.

Wilwood installation documents: Installation instructions.

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

Manufacturer 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.