GiroDisc A1-186 Front 380mm Slotted 2-Piece Rotors - BMW M2/M3/M4 2014-2020 (F8X Blue Calipers)

Fits 2014-2020 BMW M2, M3, and M4 (F80, F82, F83, F87) equipped with factory iron brakes and blue calipers.

GiroDisc 2-piece slotted rotors are a direct replacement for the factory units, designed to improve braking performance and reduce unsprung weight. By utilizing a high-carbon iron rotor ring and a 6061-T6 aircraft-grade aluminum hat, these rotors provide superior thermal management compared to standard designs. The directional internal vanes act as a centrifugal pump to pull cool air through the disc, significantly reducing brake fade during aggressive driving or track sessions.

• Manufacturer Part Number: A1-186
• Position: Front
• Diameter: 380mm
• Design: 2-Piece Slotted
• Material: High-carbon iron rotor ring with 6061-T6 aluminum hat
• Hardware: High-strength grade 12.9 cap screws with cadmium plating
• Compatibility: Replaces factory front rotors on F8X models with Blue Calipers

The slotted surface maintains a clean pad-to-rotor interface by clearing water, gas, and debris, ensuring consistent bite. Because of the two-piece design, the aluminum hat is reusable; when the iron rings are worn to the minimum thickness, you only need to replace the outer rotor rings, making this a cost-effective performance upgrade for enthusiasts.