R1 Concepts 623-32005L RNC Series Drilled Brake Rotor - Left

The R1 Concepts 623-32005L is a single left-side (driver side) drilled brake rotor from R1 Concepts' RNC Series, engineered to deliver improved stopping performance over standard OEM rotors. Constructed from G3000 grade cast iron, this rotor is built to OEM dimensional specifications for a direct-fit installation with no modifications required.

Key Features:

• Cross-Drilled Design: Precision-drilled holes are chamfered and countersunk to reduce heat buildup by up to 105°F while preventing cracking and promoting a smoother bed-in process
• G3000 Cast Iron Construction: High-grade iron casting delivers consistent thermal stability and long-lasting braking performance
• Zinc Plating: Protective zinc coating guards the hat and vane structure against corrosion; braking surface coating wears away normally during break-in
• OEM-Spec Dimensions: Designed for direct replacement with no modifications or special hardware required
• Left Side (Driver Side): This listing is for a single left-position rotor — MPN suffix "L" denotes driver-side fitment
• Ideal Applications: Daily driving, street performance, light towing, and hauling

R1 Concepts is a Los Angeles-based manufacturer with over 20 years of brake system development, offering one of the most comprehensive brake catalogs in the industry. A proper break-in (bed-in) procedure is recommended upon installation to seat the rotor and pads for optimal performance and longevity.