R1 Concepts 623-20004L RNC Series Drilled Brake Rotor - Left

The R1 Concepts 623-20004L RNC Series Drilled Brake Rotor is a direct-fit replacement rotor engineered for consistent stopping performance and improved heat dissipation. Designed as a left (driver-side) rotor, this unit slots directly into your existing brake system with no modification required.

R1 Concepts' RNC line features precision-drilled holes across the rotor face, which serve to evacuate heat, gas, and debris from the rotor-pad interface. This keeps your brake pads running cooler and reduces the risk of brake fade during demanding driving conditions. The rotor is manufactured from high-carbon gray iron for durability and consistent bite.

Key Features:

• Drilled Design: Cross-drilled holes improve heat dissipation and reduce brake fade
• Direct-Fit Replacement: Bolt-on installation with no modifications required
• High-Carbon Gray Iron Construction: Provides excellent thermal stability and long service life
• Left/Driver-Side Application: Sold individually; verify correct side before ordering
• Precision Balanced: Machined to tight tolerances for smooth, vibration-free braking
• Corrosion-Resistant Finish: Protects non-swept areas from rust during storage and service life

The R1 Concepts 623-20004L is ideal for drivers seeking an upgrade over a plain stock rotor without the added cost of a combined drilled-and-slotted unit. It meets or exceeds OEM specifications for a reliable, performance-oriented brake upgrade.