Dynamite Friction 631-31152L Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31152L) is engineered for BMW X3 and X4 models. This vented disc brake rotor features a directional, slotted, and drilled surface designed to enhance braking performance and heat dissipation.

• Compatible with BMW X3 and X4 models
• Directional slotted and drilled surface for improved brake response
• Vented rotor design for efficient heat dissipation
• Nominal thickness of 20 mm with discard thickness at 18.4 mm
• Zinc silver hat finish with rust-resistant coating
• Overall diameter of 330 mm and height of 71 mm
• Five bolt holes with 16.6 mm diameter and 120 mm bolt circle diameter

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

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on rotors that combine drilled holes and precision slots to maintain consistent braking under demanding conditions. The silver zinc coating on the hat provides corrosion resistance, extending rotor life. This product line is designed to meet the specific requirements of performance-oriented vehicles like the BMW X3 and X4, offering a balance between durability and braking efficiency.

Technical Specifications and Features

This disc brake rotor is vented to allow air circulation between the rotor surfaces, reducing heat buildup during braking. The directional slotted and drilled surface helps evacuate gases, dust, and water, improving pad contact and braking consistency. The rotor measures 330 mm in outside diameter with a height of 71 mm, fitting precisely on BMW X3 and X4 models. The zinc silver hat finish and rust-resistant coating protect against corrosion, ensuring longevity. The rotor includes five bolt holes with a diameter of 16.6 mm and a bolt circle diameter of 120 mm, matching OEM specifications.

Applications and Problem Solving

• Restores braking performance on BMW X3 and X4 vehicles with worn or damaged rotors
• Reduces brake fade caused by excessive heat during aggressive driving or towing
• Improves water and debris evacuation for consistent braking in wet conditions
• Minimizes rotor warping and extends service life with vented design and corrosion protection
• Enhances overall brake system reliability and safety

Installation Notes and Tips

Ensure the rotor surface is clean and free of contaminants before installation. Verify that the rotor thickness is within the nominal 20 mm specification and replace if below the discard thickness of 18.4 mm. Use proper torque settings for the five lug bolts with 16.6 mm diameter holes and a 120 mm bolt circle diameter. It is recommended to inspect brake pads and other components during rotor replacement to maintain optimal braking performance.

Quality Assurance

Dynamite Friction manufactures this rotor to meet or exceed OEM standards for fitment and performance on BMW X3 and X4 models. The rust-resistant coating and zinc silver hat finish contribute to durability and corrosion resistance. While specific warranty details are not provided, the product is designed for reliable, long-term use in demanding automotive applications.