R1 Concepts 830-63140L DFC GeoPerformance Drilled and Slotted Brake Rotor - Left

The R1 Concepts 830-63140L is a DFC GeoPerformance drilled and slotted brake rotor engineered for maximum stopping performance, durability, and corrosion resistance. Produced by Dynamic Friction Company (DFC) — the manufacturing arm behind R1 Concepts rotors — this left-side rotor features the premium 830-series designation, indicating a full drilled, slotted, and Geomet-coated construction.

Key Features:

• Cross-Drilled Holes: Reduce heat buildup on the rotor surface during heavy braking, helping to maintain consistent pedal feel and extend pad life
• Performance Slots: Channel away gases, dust, and debris from the pad-to-rotor contact surface, increasing bite and reducing brake fade
• Geomet Protective Coating: Advanced zinc-based corrosion-resistant coating applied to the non-braking surfaces — including the hat, vanes, and edges — to prevent rust and extend rotor life
• Left-Side Fitment (L): Designed specifically for the driver-side position; sold individually
• OEM-Grade Precision Machining: Manufactured to strict dimensional tolerances to ensure proper pad contact, minimal runout, and vibration-free braking
• Suitable for Street and Performance Use: Designed to handle everyday driving as well as more demanding conditions

When new, the entire rotor surface — including the braking face — will appear silver from the Geomet coating. During the initial break-in process, the coating on the friction surface will naturally wear away, leaving the hub, vanes, and outer edges protected. Follow a proper bed-in procedure after installation to achieve optimal braking performance and even pad transfer.