R1 Concepts 623-48004L Drilled Brake Rotor - Left

The R1 Concepts 623-48004L is a precision-drilled disc brake rotor engineered for reliable stopping power and improved thermal performance. Constructed from G3000 grade cast iron to OEM specifications, this rotor delivers consistent, fade-resistant braking while fitting directly in place of the original equipment with no modifications required.

The cross-drilled hole pattern is countersunk to minimize heat stress concentration and reduce the risk of cracking, while simultaneously promoting airflow across the rotor face to lower operating temperatures and combat brake fade. A silver zinc plating finish protects the non-braking surfaces from corrosion, extending rotor life and maintaining a clean appearance behind the wheel.

Key Features:

• G3000 grade cast iron construction for strength and long service life
• Precision cross-drilled holes with countersunk design to prevent cracking and enhance heat dissipation
• Silver zinc plated coating on non-braking surfaces for corrosion resistance
• Direct OEM-replacement fitment — no modifications required
• Left (driver) side application — part suffix "L" denotes driver-side position
• Vented disc design for continuous airflow and thermal management

The R1 Concepts 623-48004L is a dependable upgrade or direct replacement for drivers seeking improved braking consistency and rotor longevity over standard OEM components.