R1 Concepts 623-72040L RNC Series Drilled Disc Brake Rotor - Left/Driver Side

The R1 Concepts 623-72040L RNC Series Drilled Brake Rotor is a direct-fit, performance-grade disc brake rotor engineered to deliver improved stopping power over standard OEM rotors. Designed as a left/driver-side replacement, this rotor installs without modification and meets or exceeds original equipment specifications.

Key Features:

• Precision Cross-Drilled Holes: Countersunk drill pattern promotes maximum heat dissipation, lowers rotor operating temperature, and helps prevent heat-induced cracking under demanding braking conditions
• G3000 Gray Iron Construction: High-grade iron alloy provides the rigidity and thermal stability required for consistent, fade-resistant braking performance
• Silver Zinc Plating: Corrosion-resistant coating protects the hub, vanes, and non-contact surfaces from rust and oxidation, extending rotor service life and maintaining a clean appearance
• Direct OE Replacement Fit: Engineered to match factory mounting dimensions for a straightforward, bolt-on installation
• Balanced and Road-Force Tested: Each rotor is precision-machined and tested to minimize vibration and pedal pulsation

The R1 Concepts RNC drilled rotor is well-suited for drivers seeking a performance upgrade over standard smooth rotors for everyday street driving. Drilled rotors expel heat, gas, and debris from the pad-to-rotor contact surface, helping maintain consistent braking bite. This rotor is sold individually as the left/driver-side unit (part number suffix "L"). A proper bed-in procedure is recommended upon installation to ensure optimal pad transfer and rotor performance.