R1 Concepts 633-37012L RNC Series Drilled & Slotted Brake Rotor - Left

The R1 Concepts 633-37012L RNC Series Drilled and Slotted Brake Rotor is a high-performance replacement rotor engineered to deliver superior stopping power and improved thermal management over standard OEM rotors. Designed as a direct-fit replacement, this rotor installs without modification for a straightforward upgrade.

The combination drilled and slotted surface design serves a dual purpose: the drill holes reduce overall rotor weight and help dissipate heat, gases, and water rapidly, while the machined slots continuously sweep the brake pad surface clean for consistent, fade-resistant braking performance. This rotor is designed for the left (driver's) side of the vehicle.

Key Features:

• Drilled & Slotted Design: Improves heat dissipation, reduces brake fade, and clears debris from the pad surface
• Direct OEM Replacement: Engineered to meet or exceed original equipment specifications for a bolt-on fit
• Left-Side (Driver's Side) Application: MPN suffix "L" designates this as the left-hand rotor
• Zinc Dichromate Coating: Protects non-friction surfaces from corrosion and rust during storage and service life
• G3000 Grade Cast Iron Construction: Premium metallurgy ensures durability, consistent performance, and proper pad bedding
• Computer-Balanced: Precision machined to minimize vibration, noise, and pedal pulsation

R1 Concepts rotors are manufactured to strict dimensional tolerances for reliable, long-lasting braking performance. The 633-37012L is sold individually as the left-side rotor.