Wilwood Front Road Race Brake Kit for Mazda MX-5 Miata (2006–2015), Superlite 6R/ST Calipers and 12.88-Inch GT Rotors

For the listed Mazda MX-5 Miata, this front race kit combines fixed-mounted 12.88-inch GT rotor rings and hard-anodized Superlite 6R/ST calipers. Registration rings, aluminum hats and braided flexlines are part of the documented package, with BP-35 pads selected for competition temperatures. Wilwood Engineering began in 1977 under founder Bill Wood and is based in Camarillo, California. It designs and manufactures disc braking equipment for motorsport, specialized applications and street-performance vehicles. Calipers, brake rotors, master cylinders, valves, fittings and brake lines form part of the range and must match the requirements of the complete system.

Technical Details

• Manufacturer part number: 140-16093; supplied as one front axle brake kit.
• Cataloged rotor/hat mounting-hole pattern: 5 x 4.53 in; 5 x 115.06 mm bolt circle; cataloged stud-hole clearances 0.500 in; 12.70 mm. The existing hub or axle flange determines the vehicle wheel pattern and stud specification. These rotor/hat drillings do not convert that pattern.
• Flexline reference: Front Line Kit: 220-12948.
• Rotor mounting hats: Aluminum; Black E-Coat; hat offset 0.700 inches. This is a hat dimension, not the axle offset.
• Caliper finish and port: Type III Anodize; hydraulic inlet 1/8-27 NPT.
• Minimum nominal wheel diameter: 17 in; 431.8 mm; full spoke/barrel clearance must be checked using the installation drawing.
• Hydraulic service calipers: Forged Narrow Superlite 6R; 6 pistons per caliper; Forged Aluminium body; radial mounting; Thermlock pistons.
• Hydraulic installation: Braided flexlines are included; master cylinder not included; brake booster not included.
• Supplied service pads: BP-35 compound; verify suitability for the intended operating conditions.
• Mechanical contents: Separate wheel hubs are not included; mounting hardware supplied; spindles not included.
• Rotor dimensions: 12.88 in; 327.15 mm outside diameter; 1.10 in; 27.94 mm thick.
• Rotor material and surface: Spec-37 Iron; vented; GT Slotted; surface finish Plain.

Fitment & Compatibility

Use the 2006–2015 MX-5 Miata factory disc-spindle application and confirm the individual 2015 trim. DS1395 requires matching both the supplied registration ring and hat to the hub. The cataloged hat has a 0.700-inch offset and 5 x 4.53-inch pattern. Compare the intended 17-inch wheel to the full drawing. Extended cold use of the racing pads causes accelerated rotor and pad wear.

Use the fitment table below to confirm each model, year, trim and brake-package condition. The stated span does not override an individual application note.

With more than 20 years in parts, PMB Performance can help review the compatibility checks for this conversion. Include information about the axle, retained hubs and any changes from the original suspension.

Review the Installation instructions before selecting hardware or checking wheel clearance.

Manufacturer Warning

Applicable to 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.