R1 Concepts 623-74019L RNC Series Drilled Disc Brake Rotor - Left

The R1 Concepts 623-74019L is a RNC Series cross-drilled disc brake rotor designed as a direct OEM-style replacement with enhanced performance characteristics. This left-side rotor is precision-engineered to meet or exceed original equipment specifications, delivering confident stopping power for everyday driving and light performance use.

Key Features:

• Cross-Drilled Design: Precision-drilled holes improve heat dissipation, reduce brake fade, and help expel gas and debris from the braking surface for cleaner, more consistent stops
• G3000 Grade Cast Iron Construction: High-quality cast iron provides the durability, thermal stability, and balanced performance expected from a premium replacement rotor
• Silver Zinc Plated Coating: Corrosion-resistant zinc finish protects the rotor hub and vane structure from rust, extending service life and maintaining a clean appearance behind the wheel
• OEM-Compatible Fitment: Engineered to match factory dimensions and bolt patterns — no modifications required for installation
• Left-Side Specific: MPN suffix "L" designates this as the driver-side (left) rotor; verify the correct side before ordering
• Vented Rotor Construction: Internal venting channels promote airflow through the rotor, helping manage heat buildup during repeated stops

The R1 Concepts RNC Series is ideal for drivers seeking a performance-forward drilled rotor upgrade over standard smooth-face replacements, without sacrificing daily drivability or fitment precision. A proper bed-in procedure is recommended after installation to ensure optimal pad transfer and braking performance.