R1 Concepts 623-72042L RNC Drilled Brake Rotor - Left/Driver Side

The R1 Concepts 623-72042L RNC Drilled Brake Rotor is a precision-engineered replacement disc brake rotor designed to deliver confident, consistent stopping power. Built to original equipment specifications, this direct-fit rotor requires no modifications for installation, making it an ideal upgrade or replacement for the driver-side (left) position.

Manufactured from G3000 grade cast iron, this rotor provides the durability and thermal stability needed for reliable everyday braking performance. The cross-drilled hole pattern reduces heat buildup on the rotor surface, improving heat dissipation and helping to minimize brake fade during repeated stops. Drilled holes are countersunk and chamfered to maintain structural integrity and reduce the risk of cracking under stress.

Key Features:

• Cross-Drilled Design: Precision-drilled holes dissipate heat and reduce rotor temperature for fade-resistant performance
• Countersunk & Chamfered Holes: Engineered to prevent cracking and promote a smoother, more even brake pad bed-in
• G3000 Cast Iron Construction: OEM-grade iron alloy for durability, consistent bite, and long service life
• Zinc Plated Coating: Applied to the hat, vanes, and non-friction surfaces to protect against corrosion and rust
• Double Disc Ground Surface: Promotes faster, more uniform brake pad seating for quieter, smoother stops from day one
• Direct OE Replacement: Manufactured to original equipment specifications — no modifications required
• Single Rotor (Left/Driver Side): Part number 623-72042L is for the driver-side position only

R1 Concepts recommends following a proper break-in procedure after installation to ensure optimal pad transfer and maximum braking efficiency. Always replace brake pads whenever rotors are replaced for best results.