R1 Concepts 631-92038L RNC Drilled & Slotted Brake Rotor

The R1 Concepts 631-92038L RNC Brake Rotor is a cross-drilled and diamond-slotted performance brake rotor engineered to deliver superior stopping power, improved heat dissipation, and long-lasting durability. Manufactured from G3000 grade cast iron and finished with a silver zinc plating for corrosion resistance, this rotor is built to OEM specifications for a direct, no-modification-required fit.

Key Features:

• Cross-Drilled Design: Precision-drilled and chamfered holes reduce rotor surface heat by up to 105°F, improve ventilation, and feature a countersunk design to prevent cracking during the bed-in process
• Diamond Slot Technology: Slots actively remove brake dust and road debris from the pad surface, prevent pad glazing, and extend the service life of both the rotor and brake pads
• Built-In Wear Indicator: Diamond-tipped slot ends serve as a visual rotor replacement indicator — when the tips wear flush, it's time to replace
• G3000 Cast Iron Construction: Provides excellent thermal stability, strength, and consistent braking performance
• Silver Zinc Plated Coating: Protects the hub, vanes, and non-contact surfaces from rust and corrosion for improved appearance and longevity
• OEM-Spec Direct Fit: Engineered to factory specifications — no drilling, cutting, or modifications required for installation
• Sold as Single Rotor (Left/Driver Side)

This rotor is well-suited for daily street driving, light performance use, towing and hauling, and mild off-road applications. Note: When rotors are first received, the entire surface — including the braking surface — will be covered in zinc coating. This coating naturally wears away from the pad contact area during the initial break-in process, leaving the hub and inner vane structure protected.