Wilwood Red Front Dynalite Conversion for Mazda MX-5 Miata, Slotted 11-Inch GT Rotors and Hat Kit

Red Dynalite calipers clamp slotted 11-inch Spec-37 rotors in this Miata front kit. The four-piston calipers, aluminum hats and BP-20 pads are matched as a conversion rather than original-caliper replacements. Disc brake system design and manufacturing are Wilwood Engineering’s focus. Bill Wood founded the Camarillo, California company in 1977; its range spans brake rotors, master cylinders, calipers, fittings, valves and brake lines for motorsport, specialized and street-performance applications. The choice of individual components depends on the complete brake system.

Technical Details

• Manufacturer part number: 140-13379-R
• Application and package: Front Brake Kits - Street Performance; Front Kits; Disc; Sold as a kit.
• Rotor dimensions: 11.00 in; 279.4 mm outside diameter; 0.81 in; 20.57 mm thickness
• Rotor construction: Spec-37 Iron; Vented; GT Slotted
• Caliper assembly: Forged Dynalite Internal; 4 pistons per caliper; Forged Aluminium body; Lug mount
• Piston and finish specification: Stainless pistons; Red calipers; Red Powder Coat
• Hydraulic inlet: 1/8-27 NPT
• Wheel bolt pattern(s): 4 x 3.93 in; 4 x 99.82 mm
• Stud-hole / clearance provision: 0.500 in; 12.70 mm; diameter provision, not a thread designation
• Wheel diameter starting requirement: 15 in; 381 mm; verify the individual wheel against the installation drawing
• Included mechanical components: Mounting hardware: Yes; hub(s): No; spindle(s): No
• Hydraulic components supplied: Master cylinder: No; brake booster: No; brake lines: No
• Specified pad compound: BP-20
• Separate rotor-hat specification: Aluminum; Black E-Coat; offset 0.750 inch; part 170-11682

Fitment & Compatibility

Check the Miata's sports-suspension status and applicable 2001 VIN boundary. The preserved application years and DS1021's broader family heading differ at the early end, so confirm the exact car and existing hub arrangement.

Documented model groups, subject to each year, submodel and spindle/axle qualification: Mazda Miata. Application distinctions include All except Sports Suspension; w/ Sports Suspension from VIN 206467; w/ Sports Suspension to VIN 206466; w/ Sports Suspension.

The application list covers 1991–1997 and 1999–2000, plus 2001–2005 with the stated sports-suspension qualifications. The 2001 sports-suspension rows split at VIN 206466/206467; do not collapse these into an unsupported 1990–2005 direct-fit claim.

Flexible brake lines are not included. Original lines are not assumed to connect to the Wilwood calipers; select the application-specific or correctly sized universal hose and matching fittings.

Manufacturer References

• Wilwood exact kit specifications
• Wilwood installation instructions DS1021

PMB Performance brings over 20 years of experience to brake-component selection. Provide the actual hardware specification when the brake system has been modified.

Review the complete application table below with the year, submodel and installation qualifications above.