R1 Concepts 613-40044L RNC Slotted Brake Rotor - Left/Driver Side

The R1 Concepts 613-40044L RNC Slotted Brake Rotor is a high-performance replacement rotor engineered for drivers who demand improved braking response and fade resistance. Part of R1 Concepts' RNC (NanoCoat) series, this rotor features a corrosion-resistant nano-coating that protects non-swept surfaces from rust and oxidation, keeping the rotor looking clean and performing reliably throughout its service life.

The slotted design continuously cleans the brake pad surface as the rotor spins, evacuating heat, gas, and debris from the contact zone. This results in more consistent pad bite, reduced brake fade under demanding conditions, and improved wet-weather braking performance compared to standard smooth rotors.

Key Features:

• Slotted rotor design for improved heat dissipation and pad degassing
• NanoCoat (RNC) corrosion-resistant coating on non-friction surfaces for long-lasting appearance and protection
• Direct OE replacement — bolt-on fitment with no modifications required
• Left/driver-side application (suffix "L" designates driver-side fitment)
• Precision-machined to strict OE dimensional tolerances for minimal runout and smooth pedal feel
• G3000 grade cast iron construction for durability and consistent thermal performance

The R1 Concepts 613-40044L is a direct-fit, performance-upgrade brake rotor suitable for daily driving and spirited use. It is sold as a single rotor (left side). Always replace brake rotors in axle pairs and inspect brake pads for wear and compatibility when installing new rotors.