R1 Concepts 623-47038L RNC Series Drilled Disc Brake Rotor - Driver Side

The R1 Concepts 623-47038L is a precision-engineered drilled disc brake rotor from R1 Concepts' RNC Series, designed as a direct-fit replacement for the driver (left) side. Built to OEM specifications, this rotor installs without modification, making it a straightforward upgrade from worn factory brakes.

Key Features:

• Precision Cross-Drilled Holes: Countersunk and chamfered drill pattern reduces heat buildup on the rotor surface, improving heat dissipation and helping prevent cracking under repeated braking cycles
• G3000 Grade Cast Iron Construction: Manufactured from high-grade G3000 gray iron for optimal strength, thermal stability, and consistent stopping performance
• Zinc Plating Corrosion Protection: Special zinc plating applied to the hub, hat, and vane areas protects against rust and corrosion, extending rotor life and maintaining appearance
• Direct OEM Fit: Engineered to match original equipment specifications — no drilling, cutting, or modification required for installation
• Driver Side (Left) Application: This is a single rotor intended for the left/driver-side position
• Double Disc Ground Braking Surface: Promotes faster, more even brake pad bed-in for quieter and smoother stopping performance from the start

R1 Concepts' drilled rotors are well-suited for daily driving, street performance, and light towing applications. The cross-drilled pattern allows heat and gases to escape during hard braking, reducing brake fade and improving pedal feel. For best results, always replace brake pads when installing new rotors and follow R1 Concepts' recommended break-in procedure.