The Brembo GT front big brake kit for 2016 and later Mazda MX-5 (ND) applications pairs four-piston calipers with 328×28 mm cast two-piece rotors finished in silver and fitted with a slotted Type-1 pattern. The listing specifies rotor diameter, thickness and two-piece cast construction plus the slotted surface, matched to Brembo four-piston front calipers for MX-5 (ND) fitment.
Brembo 16+ Miata MX-5 (ND) Front GT BBK 4 Piston Cast 328x28 2pc Rotor Slotted Type-1-Silver