R1 Concepts 623-54272R RNC Series Drilled Brake Rotor

The R1 Concepts 623-54272R RNC Series Drilled Brake Rotor delivers confident stopping power for drivers who demand reliable, high-performance braking. Engineered to OEM specifications, this direct-fit replacement rotor requires no modifications and installs quickly using standard tools.

R1 Concepts manufactures this rotor from G3000 grade cast iron, a high-quality alloy formulated for strength, durability, and consistent heat absorption. The precision-drilled holes are countersunk to reduce thermal stress and minimize the risk of cracking, while simultaneously channeling heat away from the braking surface for fade-resistant performance during repeated stops.

Key Features:

• Precision-drilled holes with countersunk design for optimal heat dissipation and crack resistance
• G3000 grade cast iron construction for strength, stability, and long service life
• Direct OEM-replacement fit — no modifications required
• Silver zinc plated coating protects against rust and corrosion for improved appearance and longevity
• Engineered to meet or exceed original equipment specifications
• Designed for smoother, quieter, and more consistent braking performance

The protective zinc plating covers the hat and non-braking surfaces to guard against corrosion. Note that during the initial break-in process, the zinc coating on the braking surface will naturally wear away — this is normal and expected. Always replace brake pads when installing new rotors and follow the recommended bed-in procedure for best results.