R1 Concepts 623-54216L RNC Series Drilled Disc Brake Rotor - Left

The R1 Concepts 623-54216L is a precision-engineered drilled disc brake rotor from the RNC (Replacement) Series, designed as a direct-fit, left-side replacement rotor. Built to OEM specifications, this rotor installs without modification, restoring safe, reliable stopping performance to your vehicle.

Constructed from G3000 grade cast iron, the rotor delivers consistent thermal stability and long service life. The cross-drilled holes improve heat dissipation, reduce brake fade under repeated stops, and help expel gases and debris from the rotor surface — keeping the brake pad contact surface clean and effective.

Key Features:

• Drilled Design: Precision-drilled holes enhance cooling airflow and reduce heat buildup during braking
• G3000 Cast Iron Construction: OEM-grade material ensures durability and consistent braking performance
• Zinc Plating: Protective zinc coating guards against corrosion and rust for improved longevity
• Direct-Fit Replacement: Engineered to OEM specifications — no cutting, drilling, or modifications required
• Left-Side Application: This is a single left-side (driver-side) rotor; sold individually
• Countersunk Drill Holes: Reduces heat stress and prevents cracking around drilled openings

The R1 Concepts RNC Series is an ideal choice for drivers seeking a performance-oriented replacement rotor that surpasses stock stopping capability while maintaining straightforward installation and everyday reliability.