R1 Concepts 613-40019L RNC Slotted Disc Brake Rotor Left Side

The R1 Concepts 613-40019L is a slotted disc brake rotor from R1 Concepts' RNC series, engineered to deliver reliable, high-performance stopping power as a direct-fit replacement for the original equipment rotor. The "L" designation indicates this is the left (driver's side) rotor, sold individually.

R1 Concepts' RNC slotted rotors feature precision-machined slots across the braking surface, which continuously clean and deglaze the brake pad face during operation. This slot design promotes consistent bite, improved heat dissipation, and reduced brake fade under repeated or heavy braking demands—without the stress concentrations associated with drilled holes.

Key Features:

• Slotted braking surface for consistent pad-to-rotor contact and enhanced heat and gas evacuation
• G3000-grade cast iron construction for strength, stability, and long service life
• Direct OEM fitment — no modifications required for installation
• Left side (driver's side) — sold as a single rotor
• Corrosion-resistant coating on non-braking surfaces to protect against rust during storage and service
• Manufactured to meet or exceed OEM specifications for performance and durability

The R1 Concepts RNC series is ideal for drivers seeking a meaningful upgrade over a worn stock rotor while maintaining a straightforward installation process. As a single left-side rotor, part number 613-40019L can be paired with its right-side counterpart for a complete axle replacement.