Dynamite Friction 633-31113L Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Black (part number 633-31113L) is engineered for BMW models including the 118i, 120i, 228i, 230i, 320i, 328i, 428i, M135i, M140i, M235i, and M240i series. This vented disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Disc type: Vented disc brake rotor with drilled and slotted surface
• Nominal thickness: 24 mm with discard thickness at 22.4 mm
• Outside diameter: 344 mm for optimal fitment
• Hat finish: Zinc black coating for corrosion resistance
• Rust resistant coating applied for extended durability
• Bolt hole quantity: 5 with 16.6 mm diameter, bolt circle diameter 120 mm
• Directional brake surface for improved braking efficiency
• Center hole diameter: 75 mm for precise mounting

Detailed Product Description

The DFC Brake Rotor - Drilled and Slotted - Black from Dynamite Friction is designed to meet the specific braking requirements of various BMW models such as the 118i, 120i, 228i, and M240i xDrive. Its vented design allows for better heat dissipation during braking, reducing the risk of brake fade under demanding conditions. The rotor’s surface is both drilled and slotted, which helps to evacuate gases, dust, and water, maintaining consistent brake pad contact and improving overall stopping power.

Constructed with a nominal thickness of 24 mm and a discard thickness of 22.4 mm, this rotor ensures a long service life while maintaining safety standards. The zinc black hat finish and rust-resistant coating protect the rotor from corrosion, extending its durability in various driving environments. The 5-bolt hole pattern with a 120 mm bolt circle diameter and 16.6 mm bolt hole diameter ensures compatibility with the specified BMW models.

DFC Brake Rotor - Drilled and Slotted - Black Product Line

The DFC Brake Rotor - Drilled and Slotted - Black line by Dynamite Friction focuses on rotors that combine enhanced heat management with corrosion resistance. This product line features vented rotors with directional, slotted, and drilled surfaces designed to improve braking performance and rotor longevity. The black zinc coating on the hat area adds an extra layer of protection against rust, making these rotors suitable for drivers seeking reliable braking components for their BMW vehicles.

Applications and Problem Solving

• Reduces brake fade during high-performance or spirited driving
• Improves water and debris evacuation for consistent braking in wet conditions
• Minimizes rotor warping by enhancing heat dissipation
• Prevents rust and corrosion for longer rotor life
• Restores braking performance on BMW 118i, 120i, 228i, M135i, and related models

Installation Notes and Tips

Ensure the rotor surface is clean and free of any protective coatings before installation. Verify the bolt hole pattern and center hole diameter match your vehicle specifications. It is recommended to replace brake pads when installing new rotors to maintain optimal braking performance. Torque all bolts to manufacturer specifications and check for proper rotor alignment to avoid vibrations.

Quality Assurance

Dynamite Friction rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The rust-resistant coating and zinc black hat finish contribute to the rotor’s durability. While specific warranty details are not provided, Dynamite Friction products are generally backed by quality control standards to ensure reliable performance on BMW vehicles including the 320i, 328i, and M240i xDrive.