R1 Concepts 830-31166D DFC GeoPerf Drilled Slotted Brake Rotor with GeoSpec Coating

The R1 Concepts 830-31166D is a DFC GeoPerformance drilled and slotted brake rotor finished with DFC's proprietary GEOSPEC corrosion-protection coating. Engineered by Dynamic Friction Company (DFC) — the manufacturing arm behind R1 Concepts rotors — this rotor delivers a performance upgrade over standard OEM replacements while maintaining excellent street manners.

The cross-drilled holes and slots work together to maximize braking performance. Drilled holes reduce heat buildup on the rotor face, while the slots evacuate brake dust, gas, and road debris to prevent pad glazing and maintain consistent bite. The result is shorter stopping distances, especially in wet conditions.

Key Features:

• DFC GeoPerformance Design — drilled and slotted rotor for enhanced stopping power and heat management
• GEOSPEC Coating — a durable silver-gray finish that provides superior corrosion resistance over conventional paint or zinc coatings
• Processed Dry, Ships Dry — no oily film to clean off; ready to install straight out of the box
• OE Vane Configuration — engineered to match the original equipment vane layout for proper and maximum heat dissipation
• 100% Electronic Inspection — each rotor is measured across 20+ attributes at a dedicated inspection station to ensure OE specification compliance
• Mill-Balanced — smooth internal vane finish improves airflow and reduces vibration for a quieter, more consistent braking feel

The GEOSPEC finish is applied to the entire rotor — including the hat, vanes, and non-friction surfaces — delivering long-lasting protection against rust and corrosion without requiring any prep work at installation. This rotor is a direct OE replacement with a performance-focused upgrade in surface design.