Wilwood Blank Drag Hat with Half-Inch Face and 1.410-Inch Offset

This Wilwood drag hat has an undrilled flange, 1.410-inch offset and a half-inch face. Compare the hub stack and required machining dimensions. 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: 171-2234
• Rotor mounting method: Fixed Mount
• 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): Blank — flange requires machining
• Center register diameter: 2.78 inches
• Rotor mounting hole/thread designation: 5/16-18
• Internal clearance diameter: 6.14 inches
• Mounting-face thickness: 0.50 inches
• Manufacturer-listed attachment hardware reference: 230-0233D; verify the specific rotor and attachment arrangement before ordering hardware
• Manufacturer installation note: Rotor Bolt Kit 230-0233D includes a short profile Hex Head Bolt for use with solid rotors, 230-2589 Bolt kit can be used in applications where additional clearance is available between bolt head and mount hardware.
• Component: Drag Brake Rotor Hat
• Material: Aluminum
• Surface finish: Black E-Coat

Fitment & Compatibility

Select this hat for the exact Custom drag brake systems and installed hub arrangement. Compare the original part, rotor mounting circle and required hardware before replacing any component. The blank hub flange is not ready to bolt on. Have a qualified machinist verify the drilling layout, register and finished mounting surfaces for the intended assembly.

Manufacturer Reference

Wilwood component specifications and dimensions

PMB Performance has over 20 years of brake-parts experience. Send the installed component details if you need help checking this replacement.