R1 Concepts 623-21047L RNC Series Cross-Drilled Disc Brake Rotor Left

The R1 Concepts 623-21047L is a precision-engineered, cross-drilled disc brake rotor designed for direct-fit replacement on the left (driver) side. Part of R1 Concepts' RNC series, this rotor is manufactured to OEM specifications, ensuring a no-modification installation for a straightforward upgrade over factory brakes.

Key Features:

• Cross-Drilled Design: Precision-drilled holes are countersunk and chamfered to dissipate heat buildup, reduce the risk of cracking, and promote a smoother bed-in process
• G3000 Grade Cast Iron Construction: Manufactured from high-grade G3000 iron for excellent strength, stability, and consistent braking performance
• Zinc Plated Coating: Full-rotor zinc plating provides corrosion resistance on the hub and vane structure, extending rotor lifespan and maintaining appearance
• OEM Direct Fit: Engineered to original equipment specifications — no modifications or drilling required for installation
• Left Side (Driver Side): Sold as a single rotor for the left/driver-side position; verify fitment before purchase
• Improved Heat Dissipation: Drilled pattern enhances airflow and ventilation across the rotor face, reducing brake fade during repeated or hard stops

The R1 Concepts 623-21047L is well-suited for daily driving, light towing, and street performance applications where reliable stopping power and corrosion resistance are priorities. Always replace brake pads when installing new rotors, and follow R1 Concepts' recommended break-in procedure for optimal performance and longevity.