Dynamite Friction 633-31109L Disc Brake Rotor - Rear Left

Overview of the DFC Brake Rotor - Drilled and Slotted - Black

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Black (part number 633-31109L) is engineered for BMW models including the 328i, 330i, 335i, 340i, 428i, 430i, 435i, 440i, and ActiveHybrid 3. Designed to enhance braking performance, this vented disc brake rotor features a directional, slotted and drilled surface for improved heat dissipation and consistent stopping power.

• Compatible with multiple BMW models such as 328i xDrive, 335i GT xDrive, 430i Gran Coupe, and more
• Directional slotted and drilled surface for enhanced brake cooling
• Vented rotor design to reduce heat buildup during braking
• Zinc black hat finish with rust-resistant coating for durability
• Overall diameter of 330 mm with 5 bolt holes and 16.8 mm bolt hole diameter
• Nominal thickness of 20 mm and discard thickness of 18.4 mm

Detailed Product Features and Specifications

This DFC Brake Rotor - Drilled and Slotted - Black is part of Dynamite Friction's DFC line, which focuses on delivering rotors with enhanced surface treatments and structural designs to improve braking efficiency and rotor longevity. The rotor’s vented construction allows air to flow between the rotor faces, reducing heat and minimizing brake fade during demanding driving conditions. The drilled and slotted surface pattern is directional, designed to channel gases, dust, and water away from the braking surface, maintaining consistent pad contact and improving wet weather braking performance.

The rotor features a zinc black hat finish that provides corrosion resistance, extending the rotor’s service life. With a bolt circle diameter of 120 mm and 5 lug holes sized at 16.8 mm, this rotor fits securely on compatible BMW wheel hubs. The overall height and height are both 66.4 mm, ensuring proper fitment and alignment with the vehicle’s braking system.

Applications and Problem Solving

• Replaces worn or warped rotors on BMW 328i, 330i, 335i, 340i, 428i, 430i, 435i, 440i, and ActiveHybrid 3 models
• Improves brake cooling to reduce fade during spirited driving or heavy braking
• Enhances braking performance in wet conditions by evacuating water from the rotor surface
• Prevents rust and corrosion with zinc black hat finish and rust-resistant coating
• Maintains consistent braking feel by reducing pad glazing and brake dust buildup

Installation Notes and Tips

Ensure the rotor is installed on compatible BMW models listed for part number 633-31109L. Verify the bolt hole pattern and rotor dimensions before installation. Clean the rotor surface to remove any protective coatings or residues before mounting. Use proper torque specifications for lug nuts to avoid rotor warping. It is recommended to replace brake pads simultaneously to ensure optimal braking performance.

Quality Assurance and Warranty

Dynamite Friction manufactures the DFC Brake Rotor - Drilled and Slotted - Black to meet or exceed OEM specifications for fit, form, and function. The rotor includes a rust-resistant coating and zinc black finish to enhance durability. Warranty details are provided by the manufacturer and should be confirmed at the time of purchase.