Wilwood Drilled 14-Inch Rear Brake Conversion with Black AERO4 Service Calipers and EPB, Chevy 12-Bolt C-Clip Housing, 2.75-Inch Offset

This AERO4 rear package uses black hydraulic service calipers with drilled-and-slotted 14-inch rings. A separate electric parking-caliper pair and control set are included for the matched 2.75-inch-offset Chevy 12-bolt C-clip axle. Bill Wood established Wilwood Engineering in 1977, and the company is based in Camarillo, California. Wilwood designs and manufactures disc brake systems and their components for street-performance, motorsport and specialized use. Its caliper, rotor, master-cylinder, valve, fitting and brake-line products are selected according to the complete brake-system requirements.

Technical Details

• Manufacturer part number: 140-16167-D; supplied as one rear axle brake kit.
• Mechanical contents: Separate wheel hubs are not included; mounting hardware supplied; spindles not included.
• Supplied service pads: BP-10 compound; verify suitability for the intended operating conditions.
• Minimum nominal wheel diameter: 18 in; 457.2 mm; full spoke/barrel clearance must be checked using the installation drawing.
• Hydraulic installation: Hydraulic lines and fittings are separate and must be selected for the vehicle; master cylinder not included; brake booster not included.
• Hydraulic service calipers: AERO4; 4 pistons per caliper; Forged Aluminium body; radial mounting; Stainless pistons.
• Rotor dimensions: 14.00 in; 355.6 mm outside diameter; 1.10 in; 27.94 mm thick.
• Rear axle interface: 12 Bolt housing flange; 2.75 in; 69.85 mm axle offset. Measure the installed assembly.
• Rotor material and surface: Spec-37 Iron; vented; SRP Drilled & Slotted; surface finish Black Electro Coat.
• Rotor mounting hats: Aluminum; Black E-Coat; hat offset 2.035 inches. This is a hat dimension, not the axle offset.
• Caliper finish and port: Black Powder Coat; hydraulic inlet 1/8-27 NPT.
• Cataloged rotor/hat mounting-hole 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 bolt circle; cataloged stud-hole clearances 0.520 in; 13.21 mm. The existing hub or axle flange determines the vehicle wheel pattern and stud specification. These rotor/hat drillings do not convert that pattern.
• Parking-brake package: Two separate electric parking calipers, control unit, switch with pigtail and universal wiring harness included; vehicle electrical connections require installation.

Fitment & Compatibility

Installation requires the 12 Bolt housing flange and a measured 2.75-inch axle offset. Compare the housing bolt pattern, bearing/axle retention, wheel pattern and center registration with the kit drawing, then check both service-caliper and EPB-motor clearance. Nominal 18-inch wheel diameter is only the starting point. Confirm C-clip axle retention and end play; a C-clip eliminator or different housing flange requires its own fit assessment.

Vehicle fitment in the table below remains conditional on axle identity. Measure the housing flange, bearing/retention arrangement, register and offset rather than relying on vehicle year. For Chevelle, 442, Beaumont, Camaro and Apollo vehicles, establish rear-axle fit independently of the front spindle configuration. Confirm the housing flange, axle retention and offset on the installed rear assembly.

Service braking remains hydraulic; the additional electric calipers are for static parking hold and must not be used as an emergency stop brake. The switch/pigtail, controller and universal EPB harness are supplied. Plan the vehicle’s 12V power, ground and ignition/accessory wiring and protect all motor leads according to DS1353.

For help checking the installation, contact PMB Performance with the vehicle year and photographs of the existing brakes. Our more than 20 years of parts experience helps identify the details that model names alone cannot settle.

Review the Installation instructions, Technical bulletin, EPB mounting and wiring instructions before selecting hardware or checking wheel clearance.

Manufacturer Warning

Applicable to 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.