Dynamite Friction 631-31044L Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31044L) is engineered for BMW 525i, 528i, 530i, and 540i models. This vented disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Compatible with BMW 525i, 528i, 530i, and 540i models
• Part number 631-31044L for precise identification
• Vented rotor design for improved cooling
• Directional slotted and drilled surface for enhanced brake pad bite and debris removal
• Zinc silver hat finish with rust-resistant coating
• Overall diameter of 298 mm and height of 61 mm
• Nominal thickness of 20 mm with discard thickness at 18.4 mm
• Five bolt holes with 14.6 mm diameter and 120 mm bolt circle diameter

Detailed Product Description

The DFC Brake Rotor - Drilled and Slotted - Silver from Dynamite Friction is designed to meet the braking demands of BMW 5 Series vehicles including the 525i, 528i, 530i, and 540i. This rotor features a vented design that helps dissipate heat more effectively during braking, reducing the risk of brake fade under heavy use. The directional surface is both drilled and slotted, which aids in removing gas, dust, and water from the braking surface, improving pad contact and overall braking consistency.

The rotor’s hat is finished in zinc silver, providing corrosion resistance and durability, while the disc surface is plain finished with a rust-resistant coating to extend service life. With a nominal thickness of 20 mm and a discard thickness of 18.4 mm, this rotor maintains structural integrity and safety throughout its lifespan. The five bolt holes with a 14.6 mm diameter and a 120 mm bolt circle diameter ensure proper fitment and secure mounting.

DFC Brake Rotor - Drilled and Slotted - Silver Product Line

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on rotors that combine drilled holes and slots with a directional surface pattern. This design improves braking performance by enhancing heat dissipation and maintaining cleaner contact surfaces between the rotor and brake pads. The silver zinc finish on the hat and rust-resistant coating on the disc surface contribute to longer rotor life and resistance to corrosion, making it suitable for daily driving and spirited use in BMW 5 Series models.

Applications and Problem Solving

• Reduces brake fade during aggressive or repeated braking
• Improves braking performance in wet conditions by channeling water away
• Helps prevent glazing and buildup on brake pads and rotors
• Maintains consistent brake pedal feel under heavy use
• Protects against rust and corrosion for extended rotor life

Installation Notes and Tips

Ensure the rotor surface is clean and free of any protective coatings before installation. Verify the rotor thickness is above the discard thickness of 18.4 mm to maintain safety standards. Use the correct torque specifications for the five 14.6 mm bolt holes on the 120 mm bolt circle diameter. It is recommended to replace brake pads when installing new rotors to ensure optimal braking performance.

Quality Assurance

Dynamite Friction manufactures the 631-31044L rotor to meet or exceed OEM specifications for fitment and performance on BMW 525i, 528i, 530i, and 540i models. The rust-resistant coating and zinc silver hat finish provide durability and corrosion resistance. Warranty information is available through the manufacturer and should be consulted for specific coverage details.