Wilwood Black AERO4 Rear Electronic Parking Brake Kit, Chevy 12-Bolt C-Clip Axles with 2.75-Inch Offset, 14-Inch GT Rotors

Black four-piston AERO4 calipers clamp 14-inch GT rotor rings in this rear Chevy 12-bolt conversion. Separate aluminum hats position the rotors, and independent electric calipers with supplied controls provide the parking function. Camarillo, California is home to Wilwood Engineering, the company Bill Wood founded in 1977. Wilwood designs and manufactures disc braking systems and components for street-performance, motorsport and specialized applications. Its calipers, brake rotors, master cylinders, valves, fittings and brake lines are selected to work within the complete installation.

Technical Details

• Manufacturer part number: 140-16167; supplied as one rear axle brake kit.
• 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.
• Rear axle interface: 12 Bolt housing flange; 2.75 in; 69.85 mm axle offset. Measure the installed assembly.
• 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.
• Minimum nominal wheel diameter: 18 in; 457.2 mm; full spoke/barrel clearance must be checked using the installation drawing.
• Caliper finish and port: Black Powder Coat; hydraulic inlet 1/8-27 NPT.
• Parking-brake package: Two separate electric parking calipers, control unit, switch with pigtail and universal wiring harness included; vehicle electrical connections require installation.
• Rotor material and surface: Spec-37 Iron; vented; GT 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.
• Mechanical contents: Separate wheel hubs are not included; mounting hardware supplied; spindles not included.
• Supplied service pads: BP-20 compound; verify suitability for the intended operating conditions.
• Rotor dimensions: 14.00 in; 355.6 mm outside diameter; 1.10 in; 27.94 mm thick.

Fitment & Compatibility

Use only an axle that matches the documented 12 Bolt flange and 2.75-inch offset. Rear-end names can conceal different bearing flanges, so measure the installed parts. Check the rotor register, studs, axle retention and complete wheel outline rather than relying on the nominal 18-inch wheel size. Confirm C-clip axle retention and end play; a C-clip eliminator or different housing flange requires its own fit assessment.

Use the fitment table below together with a measured axle check. A model name alone does not establish conversion compatibility; compare the flange, axle offset, register and chosen wheel pattern. 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.

A separate electric caliper at each rear wheel performs the parking function; it does not replace the hydraulic service circuit. Supplied EPB equipment includes the controller, switch/pigtail and wiring harness. Install the vehicle power, ground and accessory connections using DS1353. Use the system only for parking hold, not emergency stopping.

Before selecting the conversion, PMB Performance can review the listed requirements with you. We have over 20 years of parts experience; include axle measurements and any wheel, hub or suspension changes.

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.