R1 Concepts 623-27040L RNC Series Drilled Brake Rotor - Left

The R1 Concepts 623-27040L RNC Series Drilled Brake Rotor is a high-performance replacement rotor engineered to deliver superior stopping power and improved thermal management over standard OEM rotors. Designed as a direct-fit, left-side (driver's side) replacement, this rotor installs without modifications for a hassle-free upgrade.

The precision-drilled hole pattern reduces rotor weight, improves heat dissipation, and helps evacuate gas, water, and debris from the rotor surface during braking — keeping the contact patch between pad and rotor clean and consistent. The result is more responsive, fade-resistant braking performance under both everyday driving and spirited conditions.

Key Features:

• Drilled Design: Cross-drilled holes promote cooling and reduce brake fade during repeated or hard stops
• Left-Side Fitment: Direct OEM replacement for the driver's side front or rear position (verify fitment for your specific application)
• Precision Machined: CNC-machined to tight tolerances for consistent thickness and true balance
• Corrosion-Resistant Finish: Zinc or e-coating treatment on non-braking surfaces resists rust and corrosion for a clean, lasting appearance
• OEM-Style Mounting: Matches factory bolt patterns and hub geometry for direct bolt-on installation
• Premium Gray Iron Construction: High-carbon gray iron composition provides excellent wear resistance and noise dampening

R1 Concepts rotors are manufactured to meet or exceed OEM specifications and are a popular choice for drivers seeking a reliable, performance-oriented brake upgrade. MPN: 623-27040L.