Wilwood 140-17938 Front Road Race Disc Brake Kit DPL/ST Calipers 11.75in Rotors Mazda MX-5 Miata

The Wilwood 140-17938 is a dedicated front road race disc brake kit engineered specifically for the 2016 and newer Mazda MX-5 Miata (ND generation). Designed for the demands of competitive circuit racing, this complete bolt-on system delivers superior fade resistance, consistent pedal feel, and maximum thermal stability under sustained high-heat conditions. Note: This kit requires 15-inch wheels with sufficient inside clearance to accommodate the larger-than-stock brake package.

DPL/ST Four-Piston Calipers:

• Forged aluminum caliper body with Type III Mil-Spec hard anodized medium gray finish for superior wear, abrasion, and corrosion resistance
• Thermlock® pistons reduce heat transfer from pads to caliper, extending service life and protecting fluid and seals
• Internal damper springs and high-temperature controlled-retraction piston seals ensure consistent pedal height throughout a race session
• Piston volumes sized for compatibility with OE power brake boosters and master cylinders; easily adapted for manual brake conversions and balance bar pedal setups with appropriate master cylinder sizing

Spec37 Alloy GT Competition Rotors:

• 11.75-inch diameter, 40-vane GT competition series rotors cast from Wilwood's proprietary Spec37 iron alloy
• Mounted to forged aluminum lug mount hats for minimized unsprung and rotating weight
• High cooling efficiency and rugged durability with thermal stability under sustained competition heat

Complete Kit Contents:

• DPL/ST four-piston forged aluminum calipers (pair)
• 11.75-inch 40-vane Spec37 alloy GT competition rotors with forged aluminum lug mount hats
• Bolt-on mounting brackets with all premium-grade fasteners — no modifications required, installs in stock caliper location
• High-temperature, high-friction endurance compound race brake pads selected specifically for this application
• Stainless steel braided flex lines for a complete, race-ready installation

This race-proven front brake system provides the stopping power, thermal endurance, and pedal consistency required for dedicated road racing competition on the ND-generation MX-5 Miata platform.