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Product details
Wilwood's undrilled drag hat has 1.220-inch offset and a 0.26-inch face. Confirm the 2.17-inch register and eight-bolt rotor arrangement. The manufacturer, Wilwood Engineering, was established by Bill Wood in 1977 and is based in Camarillo, California. It designs and builds disc brake systems with a range covering calipers, brake rotors, master cylinders, valves, fittings and brake lines. Motorsport, street-performance and specialized applications require components selected for the complete braking system.
Technical Details
- Manufacturer part number: 171-8976
- Internal clearance diameter: 6.40 inches
- Mounting-face thickness: 0.26 inches
- Manufacturer-listed attachment hardware reference: 230-8390; 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
- Rotor mounting method: Fixed Mount
- Hat offset: 1.220 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: 2.17 inches
- Rotor mounting hole/thread designation: 5/16-18
Fitment & Compatibility
The specified Custom drag brake systems must use the same hat geometry and rotor interface. Verify the hub register and offset measurement reference before assembling the brake system. 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 can help identify the required brake component with over 20 years of parts experience. Send the kit details and original-part measurements.
