Dynamite Friction 631-31047L Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31047L) is engineered for BMW 323i, 325Ci, 325i, 328Ci, and 328i models. This vented disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Nominal thickness: 19 mm with a discard thickness of 17.4 mm
• Vented rotor design for improved cooling
• Directional slotted and drilled surface for debris removal and consistent braking
• Rust-resistant zinc silver hat finish
• 5 bolt holes with 14.6 mm diameter and 120 mm bolt circle diameter
• Overall diameter of 294 mm and height of 59.7 mm
• Plain disc finish with a 75 mm center hole diameter

Details on the DFC Brake Rotor - Drilled and Slotted - Silver Line

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on rotors that combine drilled holes and slots to improve brake pad bite and reduce heat buildup. The silver zinc coating on the rotor hat provides corrosion resistance, extending rotor life. This product line is designed to meet the demands of performance-oriented BMW vehicles, including the 3 Series models listed.

Product Specifications and Features

This disc brake rotor is vented to allow air circulation between the rotor surfaces, which helps maintain optimal operating temperatures during braking. The directional slotted and drilled surface improves water and gas evacuation, reducing brake fade and maintaining consistent stopping power. The rotor’s nominal thickness of 19 mm ensures durability, while the discard thickness of 17.4 mm indicates when replacement is necessary for safety. The zinc silver hat finish offers rust resistance, protecting the rotor’s core components from corrosion.

Compatible BMW Models and Applications

• Compatible with BMW 323i, 325Ci, 325i, 328Ci, and 328i models
• Designed for use as a direct replacement disc brake rotor
• Ideal for addressing issues such as brake fade, uneven rotor wear, and reduced braking efficiency
• Suitable for drivers seeking improved brake cooling and performance

Installation Notes and Tips

Ensure the rotor surface is clean and free of contaminants before installation. Verify the bolt hole pattern matches the vehicle’s hub (5 holes, 14.6 mm diameter, 120 mm bolt circle). Use proper torque specifications for lug nuts to avoid rotor warping. It is recommended to replace brake pads when installing new rotors to ensure optimal braking performance.

Quality Assurance and Warranty

Dynamite Friction manufactures this rotor to meet OEM specifications for fit and function. The rust-resistant coating and vented design contribute to long service life. Please consult product documentation or the manufacturer for specific warranty details related to part number 631-31047L.