Wilwood Rear AERO4 Disc and Internal Parking-Brake Kit for Ford Mustang BMR Suspension (2005–2014), Black Calipers and 14-Inch GT Rotors

This BMR Mustang rear package combines black AERO4 calipers with GT-slotted 14-inch rotors and an internal-shoe parking brake. DS1055 lists the parking assemblies, parking-cable kit and flexlines as supplied components, rather than requiring the original parking mechanism to provide the conversion. Bill Wood founded Wilwood Engineering in 1977. Based in Camarillo, California, the company designs and manufactures disc brake systems and components for motorsport, street-performance and specialized applications. Its range spans calipers, brake rotors, master cylinders, valves, fittings and brake lines, with each component chosen to suit the complete brake system.

Technical Details

• Rotor: 14.00 in; 355.6 mm outside diameter; 1.10 in; 27.94 mm thickness. Material: Spec-37 Iron. Construction: Vented. Friction-face style: GT Slotted.
• Rotor-hat material: Aluminum. Hat offset: 1.250 inches; this hat dimension is separate from axle offset.
• Rotor surface finish: Black Electro Coat.

• Manufacturer: Wilwood; manufacturer part number: 140-13686. Supplied quantity: Sold as a kit.
• Application category: Rear Brake Kits - Street Performance. Axle/spindle category: Rear Kits. Brake function: Disc; Parking.
• Separate wheel hubs included: No. Retain only the hub arrangement specified for this kit.
• Mounting hardware included: Yes. Spindles included: No. Master cylinder included: No. Brake booster included: No.
• Flexible brake lines included: Yes; matched line kit 220-9248, 18.00 inches nominal length.
• Internal parking-shoe assemblies are included. Parking cable kit 330-12335 is also supplied; verify its vehicle routing and attachment.

• Calipers: 4 stainless pistons per caliper; radial mounting; forged aluminium bodies. Color: Black. Finish: Black Powder Coat. Inlet thread: 1/8-27 NPT.
• Caliper family: AERO4. Brake-pad compound: BP-20.

• Wheel interface: 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. Rotor/hat wheel-stud clearance: 0.520 in; 13.21 mm.
• Nominal minimum wheel diameter: 18 in; 457.2 mm. Verify the full wheel-clearance drawing; diameter alone does not establish barrel or spoke clearance.
• Housing/spindle flange: BMR Rear Suspension. Flange/axle offset: 0.00 in; 0 mm.

Fitment & Compatibility

Verify the BMR rear suspension and axle-flange geometry for the listed 2005–2014 Mustang. DS1055 describes possible flange relief for wheel-speed-sensor clearance; check the actual installation before machining. Confirm cable routing, hose travel and the 18-inch wheel envelope.

DS1055 identifies the supplied parking-shoe assemblies and cable kit. The housing flange may need clearance relief to reinstall the wheel-speed sensor, and shock clearance must be checked as described in the instructions.

Use the fitment table below for the complete model, year, submodel and brake-option conditions; every listed condition must match the installed vehicle.

Manufacturer Documents

• Wilwood product specifications and wheel-clearance drawing
• Installation instructions

Ask PMB Performance for assistance if the installed hardware differs from the documented application. With over 20 years of parts and fitment experience, we can help identify the measurements needed to check the conversion.