R1 Concepts 623-31003L RNC Series Drilled Brake Rotor - Left

The R1 Concepts 623-31003L RNC Series Drilled Brake Rotor is a high-performance, direct-fit replacement rotor engineered for drivers who demand improved braking performance and long-lasting corrosion resistance. Designed as the left (driver's side) rotor, it is precision-manufactured to OEM dimensions for a seamless, no-modification installation.

The RNC (Rotor No-Coat) designation reflects R1 Concepts' proprietary zinc-dichromate anti-rust coating applied to all non-friction surfaces — including the hat, vanes, and edges — preventing unsightly rust and corrosion without affecting braking performance. The drilled design promotes consistent heat dissipation, reduces brake fade under demanding conditions, and helps expel water, gas, and debris from the rotor surface for reliable, fade-resistant stopping power.

Key Features:

• Drilled pattern for improved heat dissipation and reduced brake fade
• RNC zinc-dichromate coating on non-contact surfaces for superior corrosion resistance
• Direct OEM replacement fit — no cutting, grinding, or modification required
• Left (driver's side) application — sold as a single rotor
• Precision-balanced for smooth, vibration-free braking
• Manufactured to strict dimensional tolerances for optimal pad contact and wear
• Silver zinc finish provides a clean, finished appearance through wheel spokes

The R1 Concepts RNC Drilled Rotor is an ideal upgrade from a stock rotor, offering enhanced performance characteristics in a bolt-on package suitable for daily driving and spirited use alike.