Wilwood Front GT Rotor & Red Narrow Dynapro Caliper Kit, Mazda MX-5 Miata / Fiat 124 Spider

Wilwood configures this front Narrow Dynapro kit around 11.00 × 0.81-inch rotors for Mazda MX-5 Miata / Fiat 124 Spider (2016–2025). The selected red calipers use 4 service pistons each; matching the factory or specified conversion hardware is essential to the complete installation. Camarillo, California is home to Wilwood Engineering, founded in 1977 by Bill Wood. The company designs and manufactures disc-brake systems for motorsport, street-performance and specialized applications. Calipers, brake rotors, master cylinders, valves, fittings and brake lines form a range whose individual components must match the complete braking system.

Technical Details

• Manufacturer part number: 140-17363-R; supplied as an axle kit.
• Supplied friction pads: BP-10 compound; match operating conditions to the intended use.
• Hydraulic lines: Braided flexlines included; verify fittings, length and routing on the actual vehicle.
• Service calipers: Narrow Dynapro Radial Mount; 4 pistons per caliper; Red Powder Coat; radial mounting; stainless pistons.
• Hydraulic sizing: cataloged bore sizes 1.38, 1.38 inches; piston area 3.00 square inches; inlet 1/8-27 NPT.
• Hardware and retained components: Mounting hardware supplied; existing wheel hubs retained; spindles, master cylinder and brake booster are not included.
• Rotor hats: Aluminum big brake hat - short offset; Black E-Coat; hat offset 0.750 inches. Hat offset is distinct from axle offset.
• Brake rotor size: 11.00-inch outside diameter × 0.81-inch thickness; vented friction section.
• Rotor/hat mounting-hole pattern: 4 x 3.93 in; 4 x 99.82 mm; cataloged hole clearances 0.500 in; 12.70 mm. These are rotor or hat drillings, not replacement wheel studs. The retained hub or axle determines the vehicle wheel pattern.
• Wheel envelope: 15-inch minimum nominal wheel diameter; verify the entire wheel-clearance drawing, including spoke and barrel shape.
• Rotor specification: Material: Spec-37 Iron; Type: GT 72 Straight Vane; Style: GT Slotted; Surface Finish: Plain.

Fitment & Compatibility

Select the Mazda MX-5 Miata or Fiat 124 Spider row below by year and brake configuration, then check DS1554 for the factory upright and 15-inch wheel envelope. This BP-10 package uses fixed-bolt GT rotor rings and aluminum hats, rather than the dynamic race attachment. The front hub remains; verify rotor registration and braided hose travel throughout steering and suspension movement. Use the fitment table below to check the complete application and option notes.

PMB Performance brings more than 20 years of parts experience to fitment questions. Send your VIN and details of the installed brakes so we can help check the application.

Review Installation instructions for the complete installation and clearance requirements.

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.