Dynamite Friction 631-31018R Disc Brake Rotor - Rear Right

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31018R) 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: 631-31018R
• Compatible with BMW 318i, 318is, 325e, 325es, 325i, 325is, 325iX
• Disc Type: Solid, drilled and slotted
• Nominal Thickness: 10 mm; Discard Thickness: 8.4 mm
• Outside Diameter: 258 mm; Overall Height: 60 mm
• Bolt Hole Quantity: 4; Bolt Circle Diameter: 100 mm
• Rust Resistant Zinc Silver Hat Finish with Plain Disc Finish
• Directional brake surface for optimized performance

Product Line Details: DFC Brake Rotor - Drilled and Slotted - Silver

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction offers rotors with enhanced surface designs combining drilled holes and slots. This configuration improves heat dissipation and helps reduce brake fade under demanding conditions. The zinc silver hat finish provides corrosion resistance, extending rotor life. This rotor line is designed to meet the specific braking needs of BMW vehicles requiring solid rotors with directional braking surfaces.

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 reliable service life before replacement is necessary. The rotor’s outside diameter measures 258 mm with an overall height of 60 mm, fitting precisely on compatible BMW models. It features four bolt holes with a 15 mm diameter and a bolt circle diameter of 100 mm, matching the factory specifications for secure mounting. The directional slotted and drilled surface improves water and debris evacuation while enhancing pad bite and braking consistency.

Applications and Problem Solving

• Replacement rotor for worn or warped brake rotors on BMW 318i, 318is, 325e, 325es, 325i, 325is, and 325iX models
• Improves heat dissipation to reduce brake fade during aggressive driving or heavy braking
• Helps maintain consistent braking performance in wet or debris-prone conditions
• Addresses rotor corrosion issues with rust-resistant zinc silver hat finish
• Restores proper braking surface for improved safety and pedal feel

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 coatings or contaminants. 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 the 631-31018R rotor to meet OEM standards for fit, form, and function. The rust-resistant coating and zinc silver hat finish contribute to durability and corrosion resistance. While no specific warranty information is provided, this rotor is designed for reliable performance on compatible BMW models when installed and maintained properly.