R1 Concepts 830-54309L DFC GeoPerformance Drilled Slotted Brake Rotor - Left

The R1 Concepts 830-54309L is a DFC GeoPerformance drilled and slotted brake rotor engineered for drivers who demand superior stopping performance and long-term durability. This is the left-side (driver side) rotor, featuring a combination of cross-drilled holes and precision-cut slots for maximum braking efficiency.

Key Features:

• Cross-Drilled & Chamfered Holes: Drilled holes reduce heat buildup on the rotor surface, while chamfering minimizes the potential for stress cracking under hard use
• Precision-Cut Slots: Slots continuously sweep away brake dust, road debris, and gases from the pad surface, preventing pad glazing and maintaining consistent bite
• GeoSpec Corrosion-Resistant Coating: A durable silver-gray GeoSpec finish is applied to the entire rotor — including the hat and vane structure — providing superior rust protection compared to conventional paint or zinc coatings
• Ready to Install: The GeoSpec coating is processed dry and shipped dry, requiring no additional cleaning or preparation before installation
• G3000/G11H18 Cast Iron Construction: Premium iron casting formulation engineered to match OEM specifications for strength, stability, and durability
• 100% Electronic Inspection: Each rotor passes an electronic quality inspection measuring over 20 attributes to ensure it meets OE tolerances
• Left Side (Driver Side): Sold individually; this part number is specifically the left/driver-side rotor

The R1 Concepts 830-54309L GeoPerformance rotor delivers improved wet-weather braking performance and reduced fade, making it an excellent upgrade for performance street driving. The DFC part number 830-54309L is also sold directly under the Dynamic Friction Company (DFC) brand.