Wilwood Big Ford New-Style Rear GT Brake Package, Red AERO4 Calipers and EPB, 14-Inch Two-Piece Rotors, 2.36-Inch Offset

Red AERO4 hydraulic brakes and separate electric parking calipers make up this GT-slotted rear conversion. The 14-inch rings mount through aluminum hats on a correctly matched new-style Big Ford axle; hydraulic hoses must be selected for the installation. 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: 140-16170-R; 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-20 compound; verify suitability for the intended operating conditions.
• Rotor material and surface: Spec-37 Iron; vented; GT Slotted; surface finish Black Electro Coat.
• Caliper finish and port: Red Powder Coat; hydraulic inlet 1/8-27 NPT.
• Hydraulic service calipers: AERO4; 4 pistons per caliper; Forged Aluminium body; radial mounting; Stainless pistons.
• Parking-brake package: Two separate electric parking calipers, control unit, switch with pigtail and universal wiring harness included; vehicle electrical connections require installation.
• Rotor dimensions: 14.00 in; 355.6 mm outside diameter; 1.10 in; 27.94 mm thick.
• 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.
• Rear axle interface: Big Ford New Style housing flange; 2.36 in; 59.94 mm axle offset. Measure the installed assembly.
• Rotor mounting hats: Aluminum; Black E-Coat; hat offset 1.625 inches. This is a hat dimension, not the axle offset.
• 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.

Fitment & Compatibility

This kit is selected for Big Ford New Style geometry at 2.36 inches of axle offset. Wheel-stud pattern and register dimensions must match the supplied rotors or hats, and the parking motors and harness connectors need clearance throughout suspension travel. Compare the intended 18-inch or larger wheel with the installation drawing.

Review the fitment table below after identifying the rear axle. Confirm housing-flange dimensions, retention hardware, offset, register and wheel pattern against the kit drawing. 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.

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.

PMB Performance has more than 20 years of parts experience and can help assess the documented brake configuration. Provide the vehicle details together with clear mounting-area photographs and measurements.

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.