R1 Concepts 631-92072L RNC Drilled & Slotted Brake Rotor Left Side

The R1 Concepts 631-92072L RNC Brake Rotor is a premium drilled and slotted performance rotor engineered for drivers who demand superior stopping power and consistent fade-free braking. This is the left (driver) side rotor, designed as a direct OEM replacement with significant performance upgrades over the stock unit.

R1 Concepts' RNC series rotors are manufactured from high-carbon grey iron, which absorbs and dissipates heat more efficiently than standard cast iron. The drilled holes reduce rotor mass and allow heat, gas, and water to escape quickly from the rotor surface, while the precision-cut slots continuously sweep the brake pad face clean for maximum bite and consistent pedal feel.

Key Features:

• Drilled & Slotted Design: Combines the benefits of cross-drilling and slotting for maximum heat dissipation and pad bite
• High-Carbon Grey Iron Construction: Resists heat cracking and provides quieter, longer-lasting performance
• Zinc Dichromate Coating: Protects non-swept rotor surfaces from rust and corrosion for a clean, finished appearance
• Direct OEM Fit: Bolt-on replacement requiring no modifications — uses factory mounting points and caliper hardware
• Left (Driver) Side: This rotor is the left/driver-side front or rear unit as specified by fitment
• Computer-Balanced: Precision machined to tight tolerances to eliminate vibration and pedal pulsation
• Thermal Stress Relief Slots: Slotting pattern helps prevent heat-induced warping and extends rotor life

The R1 Concepts RNC rotor is an ideal upgrade for performance-oriented street driving, towing applications, or any driver looking to improve braking response over stock rotors. Pair with R1 Concepts brake pads for a fully optimized brake system solution.