The Brembo front GTS big brake kit for 2019+ Mazda3 uses four-piston cast calipers with 345x28 mm two-piece slotted Type-1 rotors in black with high-availability (HA) finish. Specified for front installation, this kit provides larger calipers and two-piece rotors to improve heat control and pedal feel for Mazda3 GTS models equipped to accept this front upgrade.
Brembo 19+ Mazda3 Front GTS BBK 4 Piston Cast 345x28 2pc Rotor Slotted Type-1-Black HA