R1 Concepts 631-92005L RNC Drilled & Slotted Brake Rotor - Left

The R1 Concepts 631-92005L is a cross-drilled and diamond-slotted brake rotor from R1 Concepts' RNC series, engineered to deliver enhanced stopping performance over standard OEM replacement rotors. Sold individually as the left/driver-side rotor, this is a direct-fit replacement designed to match OEM specifications with no modifications required.

Key Features:

• Cross-Drilled Design: Precision-drilled holes with countersunk chamfering reduce rotor temperatures by dissipating heat and preventing cracking during the bed-in process
• Diamond Slot Technology: Slots clear brake dust and road debris from the pad surface, prevent pad glazing, and extend the service life of both the rotor and pads — the diamond-tipped slot ends also serve as a built-in wear indicator
• Zinc Plated Coating: Silver zinc plating protects the non-contact surfaces (hat, vanes, and edges) from corrosion for improved appearance and longer service life; the coating naturally wears from the pad-contact surface during initial break-in
• G3000 Grade Cast Iron Construction: Manufactured to OEM-equivalent material standards for reliable strength, thermal stability, and consistent braking performance
• Direct OEM Replacement Fit: Engineered to OEM specifications — no drilling, cutting, or modification needed for installation
• Versatile Performance: Suitable for daily driving, street performance, light towing/hauling, and off-road use

A proper break-in (bedding) procedure is recommended after installation to transfer an even layer of brake pad material to the rotor surface and achieve optimal braking performance. This rotor is sold as a single unit (left side); verify your vehicle application before ordering.