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Product details
This rear HP casting provides an undrilled hat for the intended custom wheel-stud layout. Its 2.320-inch offset differs from the other blank-hat version, while the 12.19-inch ring and 7.24-inch internal drum remain fixed dimensions. Founded by Bill Wood in 1977, Wilwood designs and manufactures disc brake systems in Camarillo, California. Its range includes calipers, rotors, master cylinders, valves, fittings and lines for motorsport, street performance and specialized applications. Rotor choice belongs within that complete system: the caliper, pad, mounting hardware and intended duty must work together.
Technical Details
- Manufacturer part number: 160-8865
- Quantity: One rotor; not an axle pair
- Outside diameter: 12.19 inches
- Nominal thickness: 0.81 inches
- Rotor material: Iron
- Construction: 32 vanes
- Friction surface: Plain Face
- Finish: Plain
- Approximate weight: 14.40 lb
- Factory burnished: No
- Dynamically balanced: No
- Installation orientation: Non-directional
- Registration / lug inside diameter: 3.06 inches
- Far-side inside diameter: 8.38 inches
- Rotor offset: 2.320 inches
- Internal parking-brake drum diameter: 7.24 inches
- Internal clearance diameter: 7.16 inches
- Mounting-face thickness: 0.18 inches
- Intended use and restrictions: Register adapters from 2.00 to 2.86 inches are available separately. The 3.06-inch register accepts the specified adapter rings. Rear rotor for compatible internal-drum parking-brake kits.
The integral hat is part of the rotor; caliper, pads, parking-brake mechanism and installation hardware are separate.
Fitment & Compatibility
Confirm the machining plan, parking-shoe match and required register adapter before installation. A blank hat does not establish compatibility with an arbitrary axle or wheel pattern.
Wilwood product specifications · Rotor dimension diagram
PMB Performance brings more than 20 years of brake expertise to component selection. Contact us with your existing rotor and brake-package details if you need help checking the match.
