R1 Concepts 623-01004L RNC Series Drilled Brake Rotor - Left

The R1 Concepts 623-01004L RNC Series Drilled Brake Rotor is a direct-fit replacement rotor engineered to deliver reliable stopping power and improved heat dissipation over standard OEM rotors. Designed for the driver-side (left) position, this rotor is a straightforward upgrade for drivers seeking enhanced braking performance without sacrificing everyday driveability.

R1 Concepts manufactures this rotor from G3000 grade cast iron, the same high-quality material specification used in OEM rotors, ensuring consistent pedal feel and long service life. The drilled hole pattern across the rotor face promotes rapid heat evacuation and helps expel gases, water, and debris from the rotor-to-pad contact surface — reducing brake fade during demanding driving conditions.

Key Features:

• Drilled rotor design for improved heat dissipation and reduced brake fade
• G3000 grade cast iron construction for OEM-level durability and performance
• Direct OEM replacement — no modifications required for installation
• Left (driver-side) fitment; sold individually
• E-coating or zinc wash corrosion protection on non-contact surfaces to resist rust and extend rotor life
• Precision machined for minimal runout and smooth, vibration-free braking
• Manufacturer Part Number: 623-01004L

The R1 Concepts RNC Drilled Brake Rotor is a cost-effective performance upgrade ideal for daily drivers and light-performance applications. Compatible with OEM brake pads and calipers, installation is straightforward for any professional or experienced home mechanic.