R1 Concepts 613-48057L RNC Series Slotted Brake Rotor

The R1 Concepts 613-48057L RNC Series Slotted Brake Rotor is a performance-engineered replacement rotor designed to deliver consistent, reliable stopping power. Featuring precision-cut slots along the rotor face, this rotor helps evacuate heat, gas, and debris from the brake pad contact surface — improving bite and reducing fade during demanding driving conditions.

R1 Concepts manufactures their rotors from high-quality G3000 grade cast iron, ensuring dimensional stability and long service life. Each rotor is computer-balanced and precision-machined to OE specifications for a direct, no-modification-required fitment.

Key Features:

• Slotted Design: Precision-cut slots channel away heat, gases, and brake dust for improved pedal feel and consistent braking performance
• G3000 Cast Iron Construction: High-grade iron formulation resists thermal cracking and provides excellent wear characteristics
• Computer Balanced: Minimizes vibration and eliminates brake pulsation for smooth, judder-free braking
• OE-Spec Dimensions: Direct replacement fit — no modifications or adapters required
• Corrosion-Resistant Coating: Zinc or geomet-style coating on non-braking surfaces helps protect against rust and corrosion during storage and in wet conditions
• Left-Side Application (L): This rotor is specifically designed for the driver-side (left) position

The R1 Concepts RNC series is an excellent upgrade or like-for-like replacement for drivers seeking improved thermal performance over a standard smooth rotor. Part number 613-48057L is the left/driver-side rotor and should be paired with its matching right-side counterpart for a complete axle set installation.