R1 Concepts 623-13040L RNC Series Drilled Disc Brake Rotor Left

The R1 Concepts 623-13040L is an RNC Series drilled disc brake rotor designed for the left (driver) side. Built to OEM specifications for a direct-fit, no-modification installation, this rotor delivers enhanced stopping performance over a standard replacement rotor.

Key Features:

• Precision Cross-Drilled Holes: Countersunk drilling dissipates heat buildup and helps reduce rotor temperatures, minimizing brake fade during repeated stops
• G3000 Grade Cast Iron Construction: Premium-grade cast iron formulation provides consistent thermal stability and long service life
• Zinc Dichromate Finish: Protective coating guards against rust and corrosion on non-swept rotor surfaces, maintaining a clean appearance behind the wheel
• OEM Direct-Fit Design: Engineered to match factory specifications for straightforward, bolt-on installation with no drilling, cutting, or modification required
• Left-Side Application: Sold individually as a single rotor for the driver-side (left) position

The R1 Concepts RNC Series is designed for drivers seeking improved braking performance over standard OEM rotors without sacrificing daily-driver reliability. As with all rotor replacements, brake pads should be replaced simultaneously and a proper bed-in procedure should be followed after installation.