Wilwood Left 12.91-inch GT Rotor, 1.26-inch Wide with 48 Curved Vanes

This left GT rotor combines the uncommon 1.26-inch working section with a 12.91-inch diameter. Its 6.33-inch register and 7.15-inch mounting circle identify the hat needed to center and secure the separate friction ring. 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: 160-15257
• Outside diameter / width: 12.91 inches diameter x 1.26 inches wide
• Material specification: Spec-37 Iron
• Friction surface / finish: GT Slotted; Plain
• Ventilation: 48 CV; curved
• Mounting direction: Left-hand
• Preparation: Balanced: yes; factory burnished: no
• Opposite-side component, ordered separately: 160-15256
• Rotor-to-hat/hub attachment circle: 12 x 7.15 inches
• Attachment hole size or thread: 0.316 inches
• Center registration: 6.33 inches
• Far-side inside diameter: 7.88 inches
• Approximate weight: 18.00 lb
• Quantity: one rotor ring; hat, hub, mounting hardware, calipers and pads are separate

Fitment & Compatibility

For an assembly designed around a 12.91 x 1.26-inch friction ring. Use the correct rotor fasteners and hat, checking both the 12 x 7.15-inch attachment circle and the 6.33-inch registration. Determine axle suitability from the complete brake kit, not from the rotor's diameter. The listed duty is street use through moderate-temperature competition.

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.