Dynamite Friction 631-31046L Disc Brake Rotor - Front Left

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31046L) is engineered for BMW models including the 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4. This vented disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Compatible with BMW 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4
• Part Number: 631-31046L
• Disc Finish: Plain with zinc silver hat finish
• Surface Type: Directional slotted and drilled
• Vented rotor design for improved cooling
• Rust resistant coating for extended durability
• Nominal thickness: 22 mm; Discard thickness: 20.4 mm
• Five bolt holes with 14.6 mm diameter and 120 mm bolt circle diameter
• Overall diameter: 300 mm; Height: 51.5 mm

Detailed Product Description

The DFC Brake Rotor - Drilled and Slotted - Silver from Dynamite Friction is designed to meet the braking demands of various BMW models. Its vented construction allows for efficient heat dissipation, reducing the risk of brake fade during extended use. The rotor’s directional slotted and drilled surface improves water and debris evacuation, enhancing braking consistency in wet or challenging conditions. The plain disc finish combined with a zinc silver hat finish provides corrosion resistance, supported further by a rust-resistant coating to extend rotor life.

With a nominal thickness of 22 mm and a discard thickness of 20.4 mm, this rotor maintains structural integrity and performance throughout its service life. The five bolt holes, each 14.6 mm in diameter, fit a 120 mm bolt circle diameter, ensuring precise fitment on compatible BMW models. The overall diameter of 300 mm and height of 51.5 mm align with factory specifications for the listed vehicles.

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 aims to optimize braking performance by improving heat dissipation and debris removal. The zinc silver hat finish and rust-resistant coating are standard features in this line, providing enhanced durability and corrosion protection for extended rotor life.

Applications and Problem Solving

• Reduces brake fade caused by overheating during aggressive driving or towing
• Improves wet weather braking by channeling water away from the rotor surface
• Minimizes brake dust buildup for cleaner braking components
• Prevents rust and corrosion on rotor surfaces for longer service intervals
• Ensures consistent braking performance on BMW 3 Series and Z models

Installation Notes and Tips

• Verify compatibility with your specific BMW model and year before installation
• Inspect brake pads and replace if worn to ensure optimal rotor performance
• Torque lug nuts to manufacturer specifications to avoid rotor warping
• Clean rotor surface with brake cleaner before installation to remove any protective coatings
• Follow proper bedding-in procedures after installation for best braking results

Quality Assurance

Dynamite Friction manufactures the 631-31046L rotor to meet or exceed OEM specifications for fit, form, and function. The rust-resistant coating and zinc silver hat finish contribute to long-term durability. While specific warranty details are not provided, Dynamite Friction products are generally backed by quality control standards to ensure reliable performance on BMW 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4 vehicles.