R1 Concepts 623-45011L RNC eLINE Black Series Drilled Brake Rotor Left

The R1 Concepts 623-45011L is a left (driver) side drilled brake rotor from the R1 eLINE Black Series (RNC line), engineered to deliver reliable stopping power with an aggressive appearance. Featuring precision cross-drilled holes, this rotor improves heat dissipation and reduces brake fade during demanding driving conditions.

Key Features:

• Cross-Drilled Design: Drilled holes reduce rotor surface heat buildup, channeling away gases and debris for more consistent braking performance
• Black Zinc Coating: Advanced black zinc plating protects the hub, vanes, and non-braking surfaces from corrosion, extending rotor life and maintaining a clean appearance
• Precision Machined: Manufactured to strict OEM tolerances for a direct-fit replacement with no modifications required
• Left Side Specific: Designed specifically for the driver-side (left) position — sold individually
• Chamfered Drill Holes: Chamfering around each drill hole reduces stress concentration and minimizes the risk of cracking under thermal cycling
• Balanced Vane Design: Optimized internal vaning promotes airflow through the rotor for continuous cooling during use

The R1 eLINE Black Series is built for drivers who want an upgrade over standard OEM rotors without the cost of a full race-grade setup. The black zinc finish provides lasting corrosion resistance on the hat and vanes, while the braking surface naturally wears to bare metal during the break-in process for optimal pad contact. This rotor is a direct OEM replacement and is compatible with stock brake calipers and pads.

Break-In Note: Upon initial installation, the black zinc coating on the braking surface will wear off during the bed-in process — this is normal. The hub and internal vane structure will retain the protective coating throughout the rotor's service life.