R1 Concepts 623-47044L RNC Series Drilled Disc Brake Rotor - Left

The R1 Concepts 623-47044L is a cross-drilled disc brake rotor from the R1 RNC Series, engineered as a direct-fit replacement for the left (driver's side) position. Designed with OEM specifications in mind, this rotor installs without modification for a straightforward upgrade over factory brakes.

Key Features:

• Cross-Drilled Design: Precision-drilled holes reduce rotor heat by up to 105°F, helping dissipate thermal buildup during aggressive braking and prevent brake fade
• Chamfered Drill Holes: Countersunk, chamfered holes minimize stress concentrations to reduce the risk of cracking under load
• G3000 Grade Cast Iron Construction: High-grade cast iron provides excellent stability, consistent braking power, and long service life
• Silver Zinc Plated Coating: Corrosion-resistant zinc finish protects the hub, vanes, and non-contact surfaces from rust, improving appearance and extending rotor life
• Direct-Fit Replacement: Built to OEM dimensions — no modifications, adapters, or machining required
• Left-Side Application: Part number suffix "L" designates the driver's side (left) rotor position

R1 Concepts RNC drilled rotors are well-suited for daily driving, street performance, and light-duty towing applications where improved heat management and a clean appearance behind open-spoke wheels are desired. As with all new rotors, a proper brake bed-in procedure is recommended after installation to ensure optimal pad transfer and braking performance.