R1 Concepts 633-39009R RNC Drilled and Slotted Performance Brake Rotor

The R1 Concepts 633-39009R RNC Drilled and Slotted Brake Rotor delivers upgraded stopping performance over standard OEM rotors. Engineered from G3000 grade cast iron, this rotor is built to OEM dimensional specifications for a direct-fit installation with no modifications required.

Key Features:

• Cross-Drilled Holes: Precision-drilled and countersunk to enhance ventilation, dissipate heat buildup, and reduce the risk of cracking during use
• Diamond Slot Technology: Directional slots channel away brake dust, gas, and road debris to prevent pad glazing and maintain consistent bite — diamond-tipped slot ends also serve as a built-in rotor wear indicator
• G3000 Grade Cast Iron Construction: High-quality iron alloy provides excellent thermal stability and braking consistency across a wide range of driving conditions
• Zinc Plating Finish: Silver zinc coating protects the rotor hat, vanes, and non-contact surfaces from corrosion, extending service life and maintaining appearance
• OEM-Matched Dimensions: Manufactured to factory specifications for direct bolt-on fitment — no drilling, cutting, or adapters needed
• Performance Balanced: Suitable for daily driving, street performance, light towing and hauling, and light rally/track use

R1 Concepts rotors are balanced and checked for runout before leaving the factory. A proper break-in (bedding) procedure is recommended upon installation to transfer an even layer of pad material to the rotor surface and achieve optimal braking performance. The zinc coating on the braking surface will naturally wear away during the bedding process, which is normal and expected.