Wilwood Left Black Slotted GTB Rotor, 12.88 x 1.00-inch with Twelve-Bolt Mount

The black left-hand GTB ring shares the one-inch section with its corresponding right-side mate. Its coated Spec-37 construction and asymmetrical face slots provide the specified surface configuration without including the separate mounting hat. Founded in 1977 by Bill Wood, Wilwood Engineering is based in Camarillo, California, where it designs and manufactures disc brake systems and components. Calipers, brake rotors, master cylinders, valves, fittings and brake lines serve motorsport, street-performance and specialized applications; each part must suit the complete brake system.

Technical Details

• Manufacturer part number: 160-13357-GTB
• Friction dimensions: 12.88 inches diameter x 1.00 inches wide
• Construction: Spec-37 Iron
• Surface treatment: GT Slotted; Black electrocoat
• Cooling layout: 48 CV; curved
• Mounting direction: Left-hand
• Supplied preparation: Balanced: yes; factory burnished: no
• Opposite-side component, ordered separately: 160-13356-GTB
• 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: 10.50 lb
• Quantity: one rotor ring; hat, hub, mounting hardware, calipers and pads are separate

Fitment & Compatibility

Select the separate hat for the 12 x 8.75-inch rotor-attachment pattern and 8.25-inch register. The 12.88-inch friction diameter and 1.00-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

PMB Performance brings over 20 years of brake and parts experience to component selection. Send the existing rotor identification and brake-kit details if you need help confirming the match.