GiroDisc 2021+ BMW M2/M3/M4 (G8X Excl CCM) Slotted Front Rings

Replacement rotor friction rings with hardware for the front Girodisc rotors for BMW G87 M2, G80 M3, and G82 M4. These are cast iron rings only; the Girodisc center hat is required and not included. New hardware is included. Girodisc rotors are designed for track/race cars as a two-piece disc + hat assembly, allowing replacement of only the cast iron friction ring while reusing the aluminum hat. Rings are cast, machined, and balanced in the USA from proprietary cast iron and cadmium plated for corrosion resistance. Two-piece rotors offer weight savings and improved cooling via a curved inner vane configuration. This product provides an upgrade to the stock braking system performance without requiring larger, heavier, and costlier big brake kits. Girodisc has 20 years of experience as a brake disc supplier for international race teams, originally manufacturing replacement rings for racing brake kits from Brembo, StopTech, and others, and now offering direct-replacement rotor upgrades for OEM brake systems. All material and components are USA-sourced, and all machining is done in-house. Price is for a pair of friction rings with hardware.