Wilwood Left 12.88-inch Heavy-Wall HD Rotor, Plain Face and 1.25-inch Width

For the left side of the matching brake assembly, this HD rotor supplies a plain friction face and 48-vane curved interior. Its 8.25-inch register and 1.25-inch width must agree with the hat and caliper rather than be inferred from diameter alone. Disc brake systems and components are the work of Wilwood Engineering, founded by Bill Wood in 1977 and based in Camarillo, California. The company designs and manufactures calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications, with each component selected to match the complete system.

Technical Details

• Manufacturer part number: 160-12785
• Outside diameter / width: 12.88 inches diameter x 1.25 inches wide
• Material specification: Spec-37 Iron
• Friction surface / finish: Plain Face; Plain
• Ventilation: 48 CV; curved
• Mounting direction: Left-hand
• Preparation: Balanced: yes; factory burnished: no
• Opposite-side component, ordered separately: 160-12784
• Rotor-to-hat/hub attachment circle: 12 x 8.75 inches
• Attachment hole size or thread: 0.251 inches
• Center registration: 8.25 inches
• Far-side inside diameter: 9.46 inches
• Approximate weight: 11.70 lb
• Quantity: one rotor ring; hat, hub, mounting hardware, calipers and pads are separate

Fitment & Compatibility

Use the complete brake kit to establish axle location, caliper spacing and wheel clearance. This 12.88-inch rotor needs a 12 x 8.75-inch mounting interface with 8.25-inch centering. Pad compound and sweep must be suitable for the ring material and 1.25-inch working section. Select pads and operating duty to suit the rotor material and the intended brake system.

Manufacturer reference: Wilwood rotor specifications

For help identifying the correct replacement, share the installed brake package with PMB Performance. Our team draws on over 20 years of experience with brake components and fitment.