R1 Concepts 623-45012L RNC Series Drilled Disc Brake Rotor

The R1 Concepts 623-45012L RNC Series Drilled Brake Rotor is a precision-engineered replacement disc rotor designed to deliver reliable, consistent stopping power. Manufactured from G3000 grade cast iron, this rotor meets or exceeds OEM specifications and is built for direct bolt-on installation with no modifications required.

The cross-drilled hole pattern is a defining feature of this rotor, improving thermal performance by allowing heat, gas, and brake dust to escape quickly from the rotor surface. This keeps brake temperatures lower during repeated stops and helps prevent brake fade. The drilled design also reduces overall rotor weight for a slight improvement in unsprung mass.

Key Features:

• G3000 Grade Cast Iron Construction — provides the strength, durability, and heat tolerance needed for demanding street use
• Cross-Drilled Hole Pattern — promotes cooling, dissipates heat and gas buildup, and reduces brake fade
• Precision Balanced — machined to tight tolerances to minimize vibration and pedal pulsation
• Zinc Dichromate Coating — corrosion-resistant finish protects the hat and non-swept areas from rust and environmental exposure
• OEM Fitment — direct replacement design with no drilling, cutting, or modifications needed
• Left Side (Driver Side) Fitment — part suffix "L" designates this as the left/driver-side rotor

The R1 Concepts RNC Series is ideal for drivers seeking an upgraded drilled rotor over a standard OEM replacement, offering improved thermal management and a sportier appearance behind the wheel. This rotor is sold individually and is designed as a direct OEM replacement.