R1 Concepts 623-54163L RNC Series Drilled Disc Brake Rotor - Left

The R1 Concepts 623-54163L RNC Series Drilled Brake Rotor is a precision-engineered replacement disc rotor designed to deliver reliable, consistent stopping power. This is the left/driver's side rotor, built to OEM fit standards with no modifications required for installation.

Constructed from G3000 grade cast iron, this rotor offers excellent thermal stability and wear resistance. The precision-drilled hole pattern promotes improved heat dissipation, reduces brake fade under demanding conditions, and helps evacuate water, gas, and debris from the braking surface for more consistent pad contact.

Key Features:

• G3000 Grade Cast Iron Construction — meets or exceeds OEM material specifications for durability and performance
• Drilled Hole Pattern — enhances ventilation, dissipates heat, and reduces brake fade
• Countersunk Drilled Holes — engineered to resist cracking and stress fractures at the drill points
• Zinc Plating Finish — protects non-braking surfaces from corrosion for improved appearance and longevity
• Double Disc Ground Braking Surface — promotes faster, more even brake pad bed-in and quieter stopping performance
• OEM Replacement Fit — direct bolt-on installation with no modifications required
• Left/Driver's Side — sold individually; verify correct side before ordering

The R1 Concepts RNC Series rotor is an ideal upgrade or direct replacement for drivers seeking improved braking performance over standard OEM rotors. Compatible with OEM-style and aftermarket brake pads. A proper break-in procedure is recommended after installation to achieve optimal braking performance and pad seating.