R1 Concepts 623-27018L RNC Series Drilled Brake Rotor - Left

The R1 Concepts 623-27018L RNC Series Drilled Brake Rotor is a direct-fit, performance-oriented replacement rotor engineered to deliver consistent stopping power and extended rotor life. Designed as a left-side application, this rotor integrates seamlessly into the factory brake system without the need for modifications.

R1 Concepts' RNC series features precision-drilled holes across the rotor face, which serve to dissipate heat and gas buildup generated during braking. This design helps reduce brake fade under repeated or heavy braking conditions and promotes more consistent pad bite. The rotor is manufactured from high-carbon gray iron for improved thermal conductivity and durability compared to standard cast iron rotors.

Key Features:

• Drilled design promotes heat dissipation and helps reduce brake fade
• High-carbon gray iron construction for improved strength and thermal performance
• Direct OE replacement fit — no modifications required
• Left-side application (driver or passenger side depending on vehicle — verify with fitment guide)
• Zinc dichromate coating on non-swept surfaces to resist corrosion during storage and shipping
• Precision-machined rotor face for minimal runout and smooth pad bed-in

The R1 Concepts 623-27018L is an excellent upgrade or replacement for worn OE rotors, suitable for street driving and light performance use. For best results, pair with R1 Concepts or compatible performance brake pads and perform a proper bed-in procedure after installation.