Wilwood Front Slotted 12.88-Inch Brakes, Red Dynapro Calipers for Mazda MX-5 Miata 2016–2023 and Fiat 124 Spider 2017

This red Dynapro 6 front conversion uses GT-slotted vented rotors measuring 12.88 by 0.81 inches. The original front hub remains in place on the qualifying Mazda or Fiat model, with registration rings centering the new hats. Founded in 1977 under Bill Wood, Wilwood Engineering operates from Camarillo, California. The company designs and manufactures disc braking systems and components, including calipers, master cylinders, brake rotors, fittings, valves and brake lines. Its motorsport, specialized and street-performance range requires individual parts matched to the complete braking arrangement.

Technical Details

• Manufacturer: Wilwood
• Manufacturer part number: 140-14234-R
• Kit classification: Front Brake Kits - Street Performance
• Axle position: Front Kits
• Brake Type: Disc
• Selling unit: Sold as a kit.
• Pistons per service caliper: 6
• Service-caliper piston construction: Stainless
• Service-caliper mount: Lug
• Caliper body construction: Forged aluminum
• Caliper Color: Red
• Caliper Finish: Red Powder Coat
• Caliper Inlet Port Diameter: 1/8-27 NPT
• Caliper family: Dynapro 6
• Pad compound: BP-10
• Rotor Outside Diameter: 12.88 in; 327.15 mm
• Rotor Thickness: 0.81 in; 20.57 mm
• Rotor Material: Iron
• Surface Type: GT Slotted
• Rotor construction: Vented
• Bolt Circle Diameter: 4 x 3.93 in; 4 x 99.82 mm
• Catalog stud / mounting-hole reference: 0.520 in; 13.21 mm
• Rotor surface finish: Black Electro Coat
• Hat material: Aluminum
• Hat finish: Black E-Coat
• Hat offset dimension: 0.550 in
• Minimum wheel guidance (clearance drawing required): 17 in; 431.8 mm
• Spindle Included: No
• Mounting Hardware Included: Yes
• Separate wheel hubs included: No
• Master Cylinder Included: No
• Brake Booster Included: No
• Brake Lines Included: Yes

Fitment & Compatibility

Match the listed MX-5 Miata or Fiat 124 Spider hub, year and trim, with only the stated 2017 Classica/Lusso coverage for the Fiat. The six-piston 12.88-inch package has 17-inch minimum-wheel guidance and needs the full wheel-clearance check. DS-1177 includes line kit 220-12948 and registration rings; verify the actual hose route and centering of the rotor hat.

Listed models: MX-5 Miata; 124 Spider. Use the fitment table below for the individual years, submodels and equipment conditions.

Wilwood product specifications · Installation instructions

Contact PMB Performance with the brake-kit identification and measurements for help selecting the part. Our team brings over 20 years of experience.