Wilwood Front Inner Bearing Cone for Nine-Inch Drum A-Body Hubs

This Wilwood inner cone is the 1.063-inch nominal-bore bearing used with the specified nine-inch drum-spindle A-Body conversion hub. The tapered roller component must be paired with its own race rather than another bearing cup that happens to fit the hub bore. Part of Wilwood Engineering's disc brake component range, this item should be matched to its intended brake-system configuration. Founded in 1977 by Bill Wood, the Camarillo, California company designs and manufactures calipers, brake rotors, master cylinders, valves, fittings, and brake lines for motorsport, street-performance, and specialized applications.

Technical Details

• Manufacturer part number: 370-11555
• Bearing Material: Steel
• Finish: Bare
• Cone bore: 1.063 inches nominal; 1.0625-inch reference
• Bearing reference: 4T-15580
• Required race: 370-11554
• Verified hub: 270-11527
• Supplied: One inner cone

Fitment & Compatibility

Confirm hub 270-11527 and race 370-11554. Check the spindle bearing seat and installed brake conversion before selecting parts for a Mopar A-Body.

Manufacturer Documents

• Wilwood DS719 technical document
• Wilwood product information

Representative product-family image. Confirm the ordered bearing or kit using the part number and specifications.

For a modified installation, the actual hardware matters as much as the vehicle identity. PMB Performance has over 20 years of experience helping customers work through those fitment details.