R1 Concepts 613-40003L RNC Series Slotted Brake Rotor

The R1 Concepts 613-40003L RNC Series Slotted Brake Rotor is a high-performance replacement rotor engineered for drivers who demand improved braking response and consistent fade resistance. Designed as a direct OE-style fitment, this left-side rotor installs without modification for a straightforward upgrade from factory equipment.

The RNC Series features precision-cut slots machined across the rotor face to continuously sweep the brake pad surface, expelling heat, gas, and debris during braking. This design helps maintain a clean pad contact surface, reduces brake fade under demanding conditions, and improves wet-weather braking performance.

Key Features:

• Slotted rotor design for improved heat dissipation and pad degassing
• Left-side (driver side) fitment — sold as a single rotor
• Precision-machined to strict dimensional tolerances for smooth, vibration-free braking
• High-carbon grey iron construction for superior durability and thermal stability
• Zinc dichromate coating on non-friction surfaces to resist corrosion
• Direct OEM replacement — no modifications or special hardware required
• Manufactured under strict quality control standards

R1 Concepts rotors are engineered to meet or exceed OEM specifications, making the 613-40003L an ideal choice for drivers seeking a reliable performance upgrade. Compatible with standard OEM-style brake pads or performance pad compounds.