R1 Concepts 623-27058L RNC Series Drilled Disc Brake Rotor - Left

The R1 Concepts 623-27058L is a precision-engineered drilled disc brake rotor from R1 Concepts' RNC (R1 Nakama Cross-drilled) Series. Designed as a direct OEM-style replacement with enhanced performance characteristics, this left-side rotor delivers confident, consistent stopping power for daily driving and light performance use.

Constructed from G3000 grade cast iron, this rotor meets or exceeds original equipment specifications with no modifications required for installation. The cross-drilled hole pattern improves heat dissipation, reduces brake fade during extended use, and helps channel away moisture and debris from the braking surface. A silver zinc plated coating protects the non-braking surfaces from corrosion, extending rotor life and maintaining a clean appearance.

Key Features:

• G3000 grade cast iron construction for strength and durability
• Cross-drilled design for improved ventilation and heat dissipation
• Silver zinc plated coating on hub and vane structure for corrosion resistance
• Direct OEM replacement fit — no modifications required
• Left-side (driver's side) application
• Designed for street and light performance use

R1 Concepts manufactures each rotor to strict dimensional tolerances, ensuring proper pad contact, minimal runout, and reliable braking performance. Compatible with R1 Concepts brake pad sets for optimized pad-to-rotor break-in and long-term wear performance.