Wilwood Rear Deep-Offset Parking Hat for GM 2500 (1999–2010), 4.83-Inch Register

The 1999–2010 GM 2500 Wilwood conversion uses this 1.910-inch-offset rear hat. Check its 4.83-inch register, mounting face and parking bore. Wilwood Engineering has designed and manufactured disc brake systems since Bill Wood founded it in 1977. Its Camarillo, California operation supplies calipers, master cylinders, brake rotors, valves, fittings and lines for specialized, street-performance and motorsport applications. Each component must be chosen to match the complete brake system.

Technical Details

• Manufacturer part number: 170-14029
• Component: Parking-Brake Rotor Hat
• Material: Iron
• Surface finish: Black E-Coat
• Rotor mounting method: Fixed Mount
• Position in the specified brake assembly: Rear
• Hat offset: 1.910 inch
• Rotor attachment interface: 12 x 10.75 inches; rotor attachment, separate from the hub flange
• Hub-flange mounting/clearance pattern(s): 8 x 6.50 inches; verify the actual hub and wheel-stud clearance
• Center register diameter: 4.83 inches
• Rotor mounting hole/thread designation: 5/16-18
• Parking-shoe bore: 8.12 inches
• Internal clearance diameter: 7.88 inches
• Mounting-face thickness: 0.40 inches
• Hub-side hole clearance diameter(s): 0.640 inches; these are clearance dimensions, not wheel-stud thread sizes

Fitment & Compatibility

Match this component to the documented GM 2500 truck 1999–2010 brake conversions. Confirm the mounting stack, center location and rotor hardware; vehicle model alone does not establish compatibility with a modified brake system. The parking-shoe diameter, anchor arrangement and complete drum-in-hat mechanism must match. A bare hat is not a complete parking-brake assembly.

Manufacturer Reference

Wilwood component specifications and dimensions

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