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Product details
The left-hand SRP casting completes the matching pair of 3.12-inch-register rear rotors. Its 1.910-inch-offset hat carries the 12.19-inch vented ring and 7.24-inch parking drum, making the register and offset central to correct replacement. Wilwood began in 1977 with founder Bill Wood and is based in Camarillo, California, where it designs and manufactures disc brake systems. Calipers and rotors sit alongside master cylinders, valves, fittings and lines in a range serving motorsport, street performance and specialized applications. Selecting these parts together is essential to a correctly matched brake installation.
Technical Details
- Manufacturer part number: 160-9990-BK
- 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: SRP Drilled & Slotted
- Finish: Black Electro Coat
- Approximate weight: 14.40 lb
- Factory burnished: No
- Dynamically balanced: No
- Installation orientation: Left-hand
- Registration / lug inside diameter: 3.12 inches
- Far-side inside diameter: 8.38 inches
- Rotor offset: 1.910 inches
- Internal parking-brake drum diameter: 7.24 inches
- Internal clearance diameter: 7.16 inches
- Mounting-face thickness: 0.18 inches
- Hat wheel-stud clearance pattern: 5 x 4.50/4.75/5.00 inches
- Wheel-stud clearance hole diameter: 0.52 inches
- Opposite-hand companion rotor: 160-9989-BK (sold separately)
- Intended use and restrictions: 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
Verify the axle flange, parking-shoe diameter and caliper position. Use the stated 5 x 4.50/4.75/5.00-inch wheel-stud clearances only with the corresponding existing hub pattern.
Wilwood product specifications · Rotor dimension diagram
For more than 20 years, PMB Performance has helped customers choose brake components. Share the details of your current setup for assistance with rotor selection.
