Wilwood 140-13380-R Dynapro 6 Front Big Brake Kit for 90-05 Mazda MX-5 Miata

Vehicle Fitment

• 1990-2005 Mazda MX-5 Miata (all trims) -- front axle only (OE disc spindle)

Fitment Notes

• Front-axle big-brake upgrade kit; uses factory disc spindles and requires wheel clearance check (≥ 15" wheels recommended).
• Includes calipers, rotors, hats, hardware -- not universal; ensure car matches Miata 1990-2005 specs.
• Brake lines not included; optional line-kit (e.g. Wilwood 220-11751) required if original lines are too short after caliper swap.

Features

• Forged Billet Dynapro 6-piston calipers -- excellent clamping force and heat tolerance.
• 11.00" Spec-37 GT slotted rotors (vented, 72-vane design) -- improved heat dissipation and fade resistance.
• GT slotted rotor surface enhances pad bite, venting of gases/debris, and consistent stopping performance.
• Aluminum calipers reduce unsprung weight while maintaining strength.
• High-performance brake pads included, tuned for street & track balance.
• Maintains compatibility with OE master cylinder output and retains ABS functionality.
• Bolts onto factory Miata front spindle -- no custom machining required for axle or hub.
• Allows use of modern wheels and tires while upgrading braking power, ideal for light-weight sport/track use.

Specifications

• Part Number: 140-13380-R
• Caliper Type: Forged Dynapro 6, 6-piston, red powder coat
• Rotor Size: 11.00" (279.4 mm) diameter, 0.81" (≈20.5 mm) thickness
• Rotor Design: Spec-37 iron, vented, 72-vane, GT slotted
• Hat Type: Big-Brake hat (short-offset, aluminum)
• Mount Type: OE disc spindle, lug-mount calipers
• Minimum Wheel Size: 15" (check wheel clearance diagram before install)
• Quantity: Full front kit (both left & right calipers + rotors + hats + hardware + pads)

Included Components

• 2x Forged Dynapro 6 calipers (left & right)
• 2x 11.00" Spec-37 GT slotted rotors (with hats)
• Caliper mounting hardware, rotor bolts, hat bolts
• Brake pads (pre-installed in calipers)
• Installation instructions and wheel-clearance guidance

Product Description

The Wilwood 140-13380-R Dynapro 6 Front Big-Brake Kit is a bolt-on braking upgrade engineered specifically for the 1990-2005 Mazda MX-5 Miata. Combining forged six-piston calipers with 11-inch Spec-37 GT slotted rotors and precision-fit hats, this kit delivers substantial braking power, improved heat management, and consistent pedal feel for spirited driving, track days, or upgraded street performance.

Because the kit uses the factory disc spindle and requires minimal modifications beyond checking wheel clearance (15"+ wheels recommended), it offers a straightforward way to significantly improve stopping performance over stock brakes -- ideal for Miata owners upgrading wheels, tires, suspension, or prepping for track work. The inclusion of pads, hardware, and direct-bolt mounts makes this a complete front-axle solution for performance braking reliability.