Dynamite Friction 631-31142L Disc Brake Rotor - Front Left

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31142L) is engineered for BMW X5 and X6 models. This vented disc brake rotor combines drilled and slotted surface features to enhance braking performance and heat dissipation.

• Compatible with BMW X5 and X6 models
• Directional, vented rotor design for improved cooling
• Drilled and slotted surface for enhanced brake pad bite and debris removal
• Zinc silver hat finish with rust-resistant coating
• Nominal thickness of 30 mm with discard thickness at 28.4 mm
• Five bolt holes with 16.6 mm diameter and 120 mm bolt circle diameter
• Overall diameter of 348 mm and height of 62.2 mm

Detailed Product Features and Specifications

The DFC Brake Rotor - Drilled and Slotted - Silver is part of Dynamite Friction's DFC line, designed to provide reliable braking performance with enhanced durability. This rotor features a vented design that helps dissipate heat more effectively during braking, reducing the risk of brake fade. The drilled and slotted surface improves pad bite and helps channel away water, dust, and gases generated during braking. The rotor's hat is finished in zinc silver, providing corrosion resistance, while the entire rotor is coated with a rust-resistant layer to extend service life.

With a nominal thickness of 30 mm and a discard thickness of 28.4 mm, this rotor maintains structural integrity under demanding conditions. The 348 mm outside diameter and 62.2 mm height ensure proper fitment and compatibility with the specified BMW models. The rotor includes five bolt holes with a diameter of 16.6 mm arranged on a 120 mm bolt circle, matching the BMW X5 and X6 lug pattern precisely.

Applications and Problem Solving

• Replacement for worn or warped rotors on BMW X5 and X6 vehicles
• Improves braking consistency by reducing heat buildup and brake fade
• Helps eliminate brake noise and vibration caused by uneven rotor surfaces
• Enhances wet weather braking performance by channeling water away
• Prevents rust and corrosion for longer rotor lifespan

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (28.4 mm) before installation
• Clean rotor surface and hub mounting area to prevent uneven contact
• Use proper torque specifications for the 5 lug bolts (16.6 mm diameter)
• Check brake pads for wear and replace if necessary during rotor installation
• Perform a bed-in procedure after installation to optimize braking performance

Quality Assurance and Warranty

Dynamite Friction's DFC Brake Rotor line is manufactured to meet or exceed OEM specifications for fit, form, and function. The rust-resistant coating and zinc silver hat finish contribute to the rotor's durability and corrosion resistance. While specific warranty details are not provided, Dynamite Friction products typically undergo rigorous quality control to ensure reliable performance on BMW X5 and X6 vehicles.