R1 Concepts 623-46042L RNC Series Drilled Brake Rotor - Left

The R1 Concepts 623-46042L RNC Series Drilled Brake Rotor is a precision-engineered replacement disc brake rotor designed to deliver improved stopping performance over standard OEM rotors. This is a single left-side (driver side) rotor built to R1 Concepts' quality standards for everyday street driving.

Key Features:

• Cross-Drilled Design: Drilled holes reduce heat buildup on the rotor surface, improving thermal dissipation and helping to reduce brake fade during repeated stops
• Chamfered & Countersunk Drill Holes: Holes are chamfered to maintain rotor structural integrity and countersunk to minimize the risk of cracking during normal use
• Zinc-Plated Coating: Special zinc plating protects the rotor hub and vane structure from corrosion, extending service life and improving appearance
• Double Disc Ground Braking Surface: The pad contact surface is double disc ground for a faster, more even brake pad bed-in process, promoting quieter and smoother braking performance
• Direct-Fit Replacement: Engineered as a direct OEM replacement for a hassle-free installation with no modifications required
• Single Rotor (Left Side): This listing is for one left/driver-side rotor; order the matching right-side part number if replacing in pairs

R1 Concepts rotors are manufactured to meet or exceed OEM specifications, providing reliable and consistent braking performance. The zinc coating on the braking surface will wear away during the initial bed-in process, which is normal — only the hub and inner vane structure retain the coating during service.