Dynamite Friction 633-31018L Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Black (part number 633-31018L) is engineered for BMW models including the 318i, 318is, 325e, 325es, 325i, 325is, and 325iX. This solid disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Part Number: 633-31018L
• Compatible with BMW 318i, 318is, 325e, 325es, 325i, 325is, 325iX
• Disc Type: Solid, drilled and slotted
• Disc Finish: Plain
• Hat Finish: Zinc black with rust-resistant coating
• Nominal Thickness: 10 mm; Discard Thickness: 8.4 mm
• Outside Diameter: 258 mm; Overall Height: 60 mm
• Bolt Hole Quantity: 4; Bolt Hole Diameter: 15 mm; Bolt Circle Diameter: 100 mm
• Directional brake surface for optimized performance

Details on the DFC Brake Rotor - Drilled and Slotted - Black Line

The DFC Brake Rotor - Drilled and Slotted - Black line by Dynamite Friction focuses on rotors that combine drilled holes and slots to improve brake pad bite and reduce heat buildup. The black zinc coating on the rotor hat provides corrosion resistance, extending the rotor's service life. This product line is designed to meet the demands of BMW vehicles requiring reliable stopping power and consistent performance under various driving conditions.

Technical Specifications and Features

This rotor is a solid type with a nominal thickness of 10 mm and a discard thickness of 8.4 mm, ensuring it meets safety standards for wear limits. The directional slotted and drilled surface enhances water and gas evacuation from the braking surface, which helps maintain consistent braking performance. The rotor's bolt pattern includes four 15 mm diameter holes on a 100 mm bolt circle diameter, matching the fitment requirements for the specified BMW models. The zinc black hat finish with rust-resistant coating protects against corrosion, which is critical for longevity in diverse environments.

Applications and Problem Solving

• Replacement rotor for worn or warped brake rotors on BMW 318i, 318is, 325e, 325es, 325i, 325is, and 325iX
• Improves heat dissipation to reduce brake fade during aggressive or repeated braking
• Helps eliminate brake noise and vibration caused by uneven rotor surfaces
• Maintains braking efficiency in wet conditions through drilled and slotted design
• Prevents rust and corrosion on rotor hats for extended service life

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 8.4 mm before installation. Clean the rotor surface to remove any protective coating or debris before mounting. Verify bolt hole alignment with the vehicle’s hub using the 100 mm bolt circle diameter and 15 mm bolt hole diameter. Proper torque specifications should be followed to avoid rotor warping. Directional rotors must be installed with the correct rotation direction for optimal performance.

Quality Assurance

Dynamite Friction manufactures this rotor to meet OEM specifications for fit and function on compatible BMW models. The rust-resistant zinc black coating on the rotor hat enhances durability. While no specific warranty information is provided, the rotor’s design and materials comply with industry standards for safety and performance.