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Product details
Wilwood describes this hat-mount hub as a B-Body drum-spindle part on its product page but as an A-Body disc-spindle part in the dimensional guide. The M/N dimensions also differ, so confirm both the application and geometry. Wilwood Engineering’s work covers the design and manufacture of disc brake systems for motorsport, street-performance and specialized applications. Bill Wood founded the company in 1977 in a business now based in Camarillo, California. Its calipers, master cylinders, brake rotors, brake lines, valves and fittings must be selected around the complete system.
Technical Details
- Manufacturer part number: 270-12281
- Conflicting published dimensions: Dim D: product page 2.330 inch, DS719 2.331 inch; Dim M: product page 3.710 inch, DS719 2.02 inch; Dim N: product page 2.020 inch, DS719 3.71 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
- Hat retention: Three 1/4-20 holes; Wilwood lists bolt kit 230-7032
- 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 - Hat Mount
- 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: Hat
- Product-page drawing references (inches): D = 2.330; H = 1.925; M = 3.710; N = 2.020; P = 3.010; Q = 0.250. Use the manufacturer drawing for the reference faces.
- Manufacturer bearing / race references: Inner Bearing: 370-0879; Outer Bearing: 370-0877; Inner Hub Bearing - Race: 370-0878; Outer Hub Bearing - Race: 370-0876. References identify compatible service parts and do not mean all bearings are included.
Fitment & Compatibility
Check wheel-flange position against the spindle and rotor mounting faces. Hubs for the same vehicle can use different offsets or bearing combinations and should not be substituted on model name alone. Product page identifies a 1962–1972 B-Body drum spindle; DS719 labels the same hub as 1973–1976 A-Body disc and lists a different inner bearing/race arrangement. Confirm the exact spindle application with Wilwood.
Wilwood component specifications · Manufacturer reference DS719
Our team at PMB Performance has over 20 years of parts and fitment experience. The existing component number and brake-system details help us check the match.
