Wilwood AERO4 Rear Disc and EPB Kit with Black Calipers, Big Ford New-Style Housing, 14-Inch GT Rotors and 2.36-Inch Offset

This new-style Big Ford rear kit combines black AERO4 service calipers with 14-inch GT rings and aluminum hats. Separate motor-driven EPB units provide parking hold, with both caliper assemblies mounted to the measured 2.36-inch-offset axle interface. Founded in 1977 by Bill Wood, Wilwood Engineering is based in Camarillo, California. Its disc brake systems and components serve motorsport, street-performance and specialized applications. The range includes calipers, rotors, master cylinders, valves, fittings and brake lines, chosen to suit the mounting and hydraulic requirements of the complete system.

Technical Details

• Manufacturer part number: 140-16170; supplied as one rear axle brake kit.
• Rotor dimensions: 14.00 in; 355.6 mm outside diameter; 1.10 in; 27.94 mm thick.
• 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.
• 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.
• Supplied service pads: BP-20 compound; verify suitability for the intended operating conditions.
• Rear axle interface: Big Ford New Style housing flange; 2.36 in; 59.94 mm axle offset. Measure the installed assembly.
• Hydraulic service calipers: AERO4; 4 pistons per caliper; Forged Aluminium body; radial mounting; Stainless pistons.
• Hydraulic installation: Hydraulic lines and fittings are separate and must be selected for the vehicle; master cylinder not included; brake booster not included.
• Minimum nominal wheel diameter: 18 in; 457.2 mm; full spoke/barrel clearance must be checked using the installation drawing.
• Mechanical contents: Separate wheel hubs are not included; mounting hardware supplied; spindles not included.
• Rotor mounting hats: Aluminum; Black E-Coat; hat offset 1.625 inches. This is a hat dimension, not the axle offset.

Fitment & Compatibility

Use only an axle that matches the documented Big Ford New Style flange and 2.36-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.

Any vehicle application in the fitment table below depends on the installed axle interface. Compare flange and bearing geometry, axle offset, center register and wheel hardware with the specified assembly. For a 1990 Lincoln Town Car, identify the actual axle and confirm the specified interface; do not select this conversion from model and year alone.

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.

With over 20 years of parts experience, PMB Performance can help check the brake arrangement before ordering. Send the vehicle year, axle photographs and relevant 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.