R1 Concepts 631-92031L RNC Drilled & Slotted Brake Rotor - Left

The R1 Concepts 631-92031L is a premium RNC series drilled and slotted brake rotor designed for drivers who demand improved stopping performance over a standard OEM replacement rotor. Built to R1 Concepts' exacting specifications, this left-side rotor delivers the benefits of both cross-drilled and slotted surface technology in a single high-performance package.

Key Features:

• Drilled & Slotted Surface: Cross-drilled holes reduce heat buildup and improve bite, while slots continuously sweep the brake pad surface to remove gas, dust, and debris for consistent friction
• G3000 Grade Cast Iron: Manufactured from high-quality G3000 metallurgy for excellent thermal stability and resistance to cracking under repeated hard braking
• Zinc Dichromate Coating: Corrosion-resistant coating on the non-swept surfaces helps prevent rust and extends the appearance and service life of the rotor
• OEM-Style Fitment: Direct bolt-on replacement engineered to meet or exceed original equipment dimensions and specifications — no modifications required
• Left Side Application: Specifically designed as a left (driver side) rotor; sold individually
• Street & Performance Use: Ideal for daily driving with spirited performance demands, towing, or light track use

The R1 Concepts RNC rotor is precision machined and balanced for smooth, vibration-free braking. Each rotor undergoes strict quality control to ensure proper thickness variation and runout tolerances are maintained for safe, reliable operation.