Wilwood Front Red Six-Piston Caliper and Replacement-Hub Kit, Drilled 12.19-Inch Rings, Bel Air/Biscayne/Caprice/Impala/Brookwood/Corvette/Kingswood/Townsman/Estate (1968–1982)

Red six-piston Dynapro calipers and drilled/slotted friction rings distinguish this Wilwood front hub package for the listed Chevrolet fitments. The 12.19-inch rotor assemblies use 1.10-inch-wide rings, replacement hubs and the prescribed bracket hardware. The conversion retains the appropriate original spindle, making the individual model-year and factory brake-equipment condition essential rather than a minor installation detail. 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: 140-12946-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 × 1.10-inch width; SRP Drilled & Slotted; Iron; Black Electro Coat surface finish.
• Rotor ventilation: 32 vanes.
• Wheel-mounting change from OE: +0.28 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.
• 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

Match the C3 or full-size Chevrolet application and check disc-versus-drum spindle requirements. Original single-piston power-disc restrictions must be observed where shown. Align the new hubs, bearings and calipers according to the installation procedure. Allow for 0.28 inch of outward wheel-mounting movement per side and use the wheel template to assess spoke clearance. Select hydraulic lines separately, secure them through steering movement and verify the complete system's pedal travel and brake proportioning.

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.