Dynamic Friction 631-42042L Sport Slotted Brake Rotor - Front/Rear Left

The Dynamic Friction Company (DFC) 631-42042L is a high-performance slotted brake rotor designed as a direct OE-style replacement with upgraded braking characteristics. The 631 series rotors from DFC feature precision-machined slots that help evacuate heat, gas, and debris from the braking surface, improving stopping performance and pad bite during both street and spirited driving conditions.

Key Features:

• Slotted rotor design for improved heat dissipation and debris clearing
• Left-side (driver side) application — always replace rotors in axle pairs for optimal braking balance
• Manufactured to strict dimensional tolerances for precise OE fitment
• G3000 grade cast iron construction for durability and long service life
• Zinc dichromate coating on non-friction surfaces to resist corrosion during storage and initial installation
• Computer-balanced to minimize vibration and brake pedal pulsation
• Direct bolt-on installation — no modifications required

Dynamic Friction Company rotors undergo rigorous quality control and are engineered to meet or exceed original equipment specifications. The 631-42042L is the left-side rotor; the matching right-side rotor is the 631-42042R. For best results, replace brake pads at the same time as rotors.