R1 Concepts 623-21028L RNC Series Drilled Brake Rotor

The R1 Concepts 623-21028L is a RNC Series drilled brake rotor engineered for improved braking performance and thermal management. Drilled rotors feature precision-machined holes across the rotor face that help dissipate heat, release gases, and expel brake dust and water — resulting in more consistent, fade-resistant stopping power.

Key Features:

• Precision drilled holes for enhanced heat dissipation and reduced brake fade
• High-carbon grey iron construction for durability and noise reduction
• Zinc dichromate coating on non-friction surfaces to resist corrosion and rust
• Computer-balanced design to minimize vibration and pedal pulsation
• Manufactured to OE specifications for a direct bolt-on fit
• G3000 grade cast iron meets or exceeds OEM standards

R1 Concepts rotors undergo rigorous quality control testing to ensure precise dimensional tolerances, proper runout, and consistent thickness variation. The 623-21028L is a left-side (driver's side) replacement rotor designed for a straightforward, no-modification installation.