Wilwood Left Plain-Face HD Rotor in Spec-37 Iron, 12.19-inch by 0.81-inch

The left HD ring combines smooth contact faces with a narrow 0.81-inch friction section. At 12.19 inches in diameter, it must sit at the correct radial and axial position inside the intended caliper rather than simply share the hat's bolt pattern. The manufacturer is Wilwood Engineering of Camarillo, California, founded by Bill Wood in 1977. It designs and manufactures disc brake systems, supplying calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications. Matching this component requires consideration of the complete brake system.

Technical Details

• Manufacturer part number: 160-12290
• Outside diameter / width: 12.19 inches diameter x 0.81 inches wide
• Material specification: Spec-37 Iron
• Friction surface / finish: Plain Face; Plain
• Ventilation: 36 CV; curved
• Mounting direction: Left-hand
• Preparation: Balanced: no; factory burnished: no
• Opposite-side component, ordered separately: 160-12289
• Rotor-to-hat/hub attachment circle: 8 x 7.00 inches
• Attachment hole size or thread: 0.326 inches
• Center registration: 6.38 inches
• Far-side inside diameter: 8.56 inches
• Approximate weight: 9.50 lb
• Quantity: one rotor ring; hat, hub, mounting hardware, calipers and pads are separate

Fitment & Compatibility

Select the separate hat for the 8 x 7.00-inch rotor-attachment pattern and 6.38-inch register. The 12.19-inch friction diameter and 0.81-inch section must agree with caliper placement and pad sweep. This mounting circle is independent of the vehicle's wheel-stud pattern. Select pads and operating duty to suit the rotor material and the intended brake system.

Manufacturer reference: Wilwood rotor specifications

Over 20 years of brake and parts experience support PMB Performance's fitment assistance. We can help assess the specified rotor against the hardware already on the vehicle.