Wilwood Front Camaro Hub for Vented-Rotor Conversions (1979–1981), A34 Outer Bearing

The 1979–1981 Camaro application uses an A34 outer-bearing reference with this front adapter hub. Its mounting geometry differs from other Camaro hubs even when their wheel bolt circles match. Disc brake system design and manufacturing are Wilwood Engineering’s focus. Bill Wood founded the Camarillo, California company in 1977; its range spans brake rotors, master cylinders, calipers, fittings, valves and brake lines for motorsport, specialized and street-performance applications. The choice of individual components depends on the complete brake system.

Technical Details

• Manufacturer part number: 270-10439
• 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 = 1.584; D = 2.495; H = 1.796; M = 3.150; N = 1.640; P = 3.140; 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
• 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

Fitment & Compatibility

The wheel flange and rotor attachment are different interfaces. Check both against the specified hub, spindle and brake-kit drawing, including the bearings and required fasteners.

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.