Wilwood Rear Drag Hat with Half-Inch Mounting Face, 1.410-Inch Offset

This Wilwood rear drag hat combines 1.410-inch offset with a half-inch mounting face. Check the hub stack before selecting rotor bolts. Since its founding by Bill Wood in 1977, Wilwood Engineering has focused on disc brake system design and manufacturing. Based in Camarillo, California, it offers calipers, rotors, brake lines, master cylinders, fittings and valves for motorsport, street-performance and specialized installations. Choose components to satisfy the requirements of the entire braking system.

Technical Details

• Manufacturer part number: 170-0764
• Position in the specified brake assembly: Rear
• Hat offset: 1.410 inch
• Rotor attachment interface: 8 x 7.00 inches; rotor attachment, separate from the hub flange
• Hub-flange mounting/clearance pattern(s): 5 X 4.50, 5 X 4.75, 5 X 5.00 inches; verify the actual hub and wheel-stud clearance
• Center register diameter: 3.06 inches
• Rotor mounting hole/thread designation: 5/16-18
• Internal clearance diameter: 6.14 inches
• Mounting-face thickness: 0.50 inches
• Hub-side hole clearance diameter(s): 0.520 inches; these are clearance dimensions, not wheel-stud thread sizes
• Manufacturer-listed attachment hardware reference: 230-0233D; verify the specific rotor and attachment arrangement before ordering hardware
• Rotor-bolt clearance: The listed 230-0233D kit uses short-profile hex-head bolts for the solid-rotor drag assembly. Use 230-2589 only where the installation provides sufficient clearance between the rotor-bolt heads and caliper mounting hardware.
• Manufacturer installation note: 3.06 " diameter register with counterbore for register ring.
• Component: Drag Brake Rotor Hat
• Material: Aluminum
• Surface finish: Black E-Coat
• Rotor mounting method: Fixed Mount

Fitment & Compatibility

Match this component to the documented Drag brake systems. Confirm the mounting stack, center location and rotor hardware; vehicle model alone does not establish compatibility with a modified brake system. Select the rotor and attachment hardware separately for the documented assembly. Follow the installation drawing for engagement and clearance at every mounting point.

Manufacturer Reference

Wilwood component specifications and dimensions · Wilwood 230-0233D / 230-2589 hardware-clearance reference

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