Wilwood Front 14-Inch GT Rotor and Black Six-Piston Caliper Package, Mazda MX-5 Miata (2006–2015), with Flex Lines

Wilwood pairs black Superlite six-piston calipers with 14-inch GT slotted rotor rings in this MX-5 Miata front brake conversion. The larger Spec-37 rings mount to separate hats on the compatible factory hubs. BP-10 pads, brackets and the front flex lines listed in the installation document are supplied as the selected package, with wheel clearance requiring particular attention at this rotor diameter. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings, and brake lines for motorsport, street-performance, and specialized applications.

Technical Details

• Manufacturer part number: 140-12911
• Type: Forged Narrow Superlite 6R Big Brake Front Brake Kit (Hat).
• Calipers: Forged Narrow Superlite 6R; 6-piston; Black Powder Coat.
• Piston bore dimensions: 1.38, 1.12, 1.12 inches; stainless pistons. Caliper mounting: radial.
• Included pad compound: BP-10.
• Rotors: 14.00-inch outside diameter × 1.10-inch width; GT Slotted; Spec-37 Iron; Black Electro Coat surface finish.
• Rotor ventilation: 72 curved vanes.
• Rotor hats: Big Brake Hat - Flared Bell; Aluminum; Black E-Coat.
• Wheel bolt circles: 5 x 4.53 inches.
• Included: paired calipers, pads, rotors and mounting hardware, caliper mounting brackets, rotor hats.
• Application-specific hydraulic flex lines included.
• Conditional wheel minimum: 18 inches. Compare the complete wheel-clearance diagram with both barrel and spoke dimensions.

Fitment & Compatibility

Check the individual 2006–2015 model-year and trim entry and verify the original hub and spindle arrangement. Inspect hat seating before following the rotor and bracket installation sequence. The conditional 18-inch minimum does not guarantee clearance of every wheel; compare spoke shape and barrel depth with the complete drawing. Route the supplied hoses through steering travel without rubbing or tension, then review pedal travel and front-to-rear balance with the rear brakes already on the vehicle.

Match the individual year, model, submodel and equipment conditions in the fitment table below.

Wilwood installation documents: Installation instructions.

PMB Performance has over 20 years of brake-system experience. Contact us with the vehicle and installed hardware details for help confirming the complete setup.

Manufacturer warning, brake pads only: WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.