R1 Concepts 631-37013L RNC Series Drilled & Slotted Brake Rotor - Left

The R1 Concepts 631-37013L RNC Series Brake Rotor is a direct-fit, performance-upgrade replacement rotor featuring a drilled and slotted surface design. Engineered for improved braking performance over stock rotors, this left-side rotor is built to OE specifications for a hassle-free installation with no modifications required.

The drilled holes help dissipate heat and reduce brake fade during repeated stops, while the slots continuously sweep the brake pad surface to remove gas, dust, and debris — maintaining consistent contact and bite. The rotor is manufactured from high-carbon grey iron for excellent thermal capacity and long service life.

Key Features:

• Drilled & Slotted Design — Improves heat dissipation and reduces brake fade under demanding conditions
• High-Carbon Grey Iron Construction — Superior strength and thermal management compared to standard iron rotors
• Direct OE Replacement — Bolt-on fitment with no modifications needed
• Left-Side Application — Designed specifically for the driver-side (left) position
• Zinc Dichromate Coating — Protects non-swept rotor surfaces from rust and corrosion
• G3000 Grade Material — Meets or exceeds OEM material standards
• Balanced & Precision Machined — Minimizes vibration and pedal pulsation

The R1 Concepts RNC rotor is an ideal upgrade for drivers seeking enhanced stopping performance and a cleaner wheel appearance. Compatible with OEM-style brake pads and requiring no special break-in procedure beyond standard bedding.