Wilwood Left 11.75 x 0.81-inch Burnished GT Rotor with 36 Curved Vanes

Factory preparation is the defining change on this left-hand GT rotor. The narrow 11.75 x 0.81-inch ring retains its curved-vane cooling and eight-bolt registration, requiring the same precise mounting and pad sweep checks as an unburnished rotor. This component comes from Wilwood Engineering, founded by Bill Wood in 1977 and based in Camarillo, California. Wilwood designs and manufactures disc brake systems, including calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications, with compatibility determined by the complete brake assembly.

Technical Details

• Manufacturer part number: 160-12286-B
• Outside diameter / width: 11.75 inches diameter x 0.81 inches wide
• Material specification: Spec-37 Iron
• Friction surface / finish: GT Slotted; Plain
• Ventilation: 36 CV; curved
• Mounting direction: Left-hand
• Preparation: Balanced: yes; factory burnished: yes
• Opposite-side component, ordered separately: 160-12285-B
• 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: 7.87 inches
• Approximate weight: 9.00 lb
• Quantity: one rotor ring; hat, hub, mounting hardware, calipers and pads are separate

Fitment & Compatibility

Compare the existing hat interface with the 8 x 7.00-inch rotor pattern, then check the 6.38-inch centering register. Proper axial placement and full pad contact are required around the 11.75-inch ring. A matching wheel-bolt pattern is not a substitute for this rotor-to-hat check. 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.