Wilwood Front GM G-Body Rotor-Adapter Hub (1980–1987), Confirm H Dimension

For the specified GM G-Body front conversion, this hub provides an intermediate rotor-plate attachment. A disagreement in the published H dimension prevents treating the listed geometry as settled. Bill Wood’s 1977 founding of Wilwood Engineering began a disc brake design and manufacturing business based in Camarillo, California. The range includes master cylinders, calipers, rotors, brake lines, valves and fittings for motorsport, street-performance and specialized vehicles. Component selection must consider the complete braking arrangement.

Technical Details

• Manufacturer part number: 270-11043
• Conflicting published dimensions: Dim H: product page 1.950 inch, DS719 1.530 inch. Confirm the supplied hub and reference faces before using either value.
• 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
• 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 = 1.724; D = 2.495; H = 1.950; M = 3.150; N = 1.520; P = 3.070; Q = 0.340. Use the manufacturer drawing for the reference faces.
• Manufacturer bearing / race references: Inner Bearing: 370-0879; Outer Bearing: 370-0933; Inner Hub Bearing - Race: 370-0878; 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

Fitment & Compatibility

Use the exact conversion instructions to compare the spindle and hub dimensions. Confirm the bearing seats, rotor mounting arrangement and wheel-stud engagement before assembling the replacement.

Wilwood component specifications · Manufacturer reference DS719

For fitment assistance backed by more than 20 years of experience, share the installed brake configuration with PMB Performance before ordering.