Wilwood Right Black Spec-37 GT Brake Rotor, 1.25-inch Wide, 14.25-inch Diameter

This black GTB version preserves the heavy-wall 1.25-inch section and right-hand curved-vane geometry. The coating covers a Spec-37 iron ring with GT slots; the installation still requires its own compatible hat and fasteners. The broader Wilwood range covers calipers, brake rotors, master cylinders, valves, fittings and brake lines. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California, designing and manufacturing disc brake systems for motorsport, street-performance and specialized applications. Individual components must be coordinated with the complete braking system.

Technical Details

• Manufacturer part number: 160-11315-GTB
• Friction dimensions: 14.25 inches diameter x 1.25 inches wide
• Construction: Spec-37 Iron
• Surface treatment: GT Slotted; Black electrocoat
• Cooling layout: 72 CV; curved
• Mounting direction: Right-hand
• Supplied preparation: Balanced: yes; factory burnished: no
• Opposite-side component, ordered separately: 160-11316-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: 10.00 inches
• Approximate weight: 18.80 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 14.25-inch friction diameter and 1.25-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

Choosing a rotor involves more than its outside diameter. PMB Performance's 20-plus years of brake and parts experience can help you check the component against your existing assembly.