R1 Concepts 623-39024L RNC Series Drilled Brake Rotor

The R1 Concepts 623-39024L is a drilled disc brake rotor from R1 Concepts' RNC Series, designed as a direct OEM replacement with enhanced performance characteristics. Built to OEM specifications, this rotor installs without modification and restores proper braking function while offering improved heat management over a standard blank rotor.

The cross-drilled hole pattern promotes airflow across the rotor face, helping to dissipate heat buildup during repeated stops and reducing the risk of brake fade. The drilled design also helps evacuate water, gas, and debris from the pad-to-rotor contact surface for more consistent bite in varied driving conditions.

Key Features:

• Drilled rotor design for improved heat dissipation and reduced brake fade
• Direct OEM replacement — no modification or drilling required for installation
• Left (driver's side) position — part suffix "L" designates fitment side
• Manufactured to OEM dimensional specifications for proper caliper and pad clearance
• Zinc-coated non-braking surfaces to resist corrosion and maintain appearance
• Precision-machined for minimal runout and smooth, vibration-free braking performance
• Compatible with OEM and aftermarket brake pads

R1 Concepts is a Los Angeles-based manufacturer specializing in performance and replacement braking systems. The RNC Series offers a reliable, cost-effective upgrade path for drivers seeking improved thermal performance over a standard blank replacement rotor without moving to a fully slotted design.