Wilwood Front Mustang Rotor-Adapter Hub (1970–1973), A13/A12 Bearing Arrangement

This front hub is listed for the 1970–1973 Mustang spindle arrangement. A13/A12 bearings and the published mounting dimensions must match the conversion, even where another hub shares the same wheel pattern. Wilwood Engineering, founded in 1977 by Bill Wood, is based in Camarillo, California. The company designs and manufactures disc brake systems and supplies master cylinders, calipers, brake rotors, valves, fittings and lines for motorsport, street-performance and specialized installations. Select each component around the complete system’s requirements.

Technical Details

• Manufacturer part number: 270-11070
• Material: Aluminum
• Finish: Bare
• Wheel mounting pattern(s): 5 x 4.50, 5 x 4.75 inches; separate from rotor or drive-flange attachment
• Wheel-stud thread: 1/2-20
• Rotor mounting arrangement: Adapter
• Rotor interface: 5 x 3.88; this is not the wheel bolt circle
• Compatible rotor-adapter output interface(s): 6 x 6.25, 8 x 7.00; match the actual adapter and rotor
• Product-page drawing references (inches): A = 1.129; D = 2.495; H = 1.530; M = 3.150; N = 1.760; P = 3.020; Q = 0.250. Use the manufacturer drawing for the reference faces.
• Manufacturer bearing / race references: Inner Bearing: 370-0884; Outer Bearing: 370-0882; Inner Hub Bearing - Race: 370-0883; Outer Hub Bearing - Race: 370-0881. References identify compatible service parts and do not mean all bearings are included.
• Related assembly part reference(s): 300-3307; 300-3099; check the kit contents and obtain any separately required parts
• Package: One hub; the compatible rotor, rotor adapter or hat and its attachment hardware are selected for the complete conversion
• Hub closure and races: Manufacturer describes included bearing races and screw-on aluminum cap; confirm the supplied assembly and obtain the compatible bearings separately
• Component: Hub - Vented Rotor Offset
• Position in the specified assembly: Front

Fitment & Compatibility

Compare the spindle journals, bearing references and hub mounting faces with the complete brake assembly. A shared wheel bolt pattern alone does not establish hub interchangeability.

Wilwood component specifications · Manufacturer reference DS719

With more than 20 years of parts and fitment experience, PMB Performance can help compare the existing brake assembly with the required component.