Dynamite Friction 640-31118 Disc Brake Rotor - Rear

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Dimpled and Slotted (part number 640-31118) is engineered for BMW 328i and 330i models. This vented disc brake rotor is designed to provide consistent braking performance and improved heat dissipation for these specific vehicles.

• Compatible with BMW 328i and 330i models
• Part number 640-31118 for precise identification
• Vented rotor design for enhanced cooling
• Dimpled and slotted surface to reduce brake fade
• Dimensions: 324mm outside diameter, 120mm inside diameter
• Nominal thickness of 22mm and discard thickness of 20.4mm
• Five bolt holes with 14.5mm diameter each
• Height of 67.2mm for proper fitment

Details on the DFC Brake Rotor - Dimpled and Slotted Line

The DFC Brake Rotor - Dimpled and Slotted line from Dynamite Friction focuses on rotors that feature both dimples and slots on the braking surface. This design helps to improve brake pad bite and channel away gases and debris during braking. The vented rotor construction further aids in heat dissipation, which is critical for maintaining braking efficiency under demanding conditions. This product line is tailored to provide reliable performance for vehicles like the BMW 328i and 330i, ensuring compatibility and durability.

Technical Specifications and Features

This disc brake rotor has an outside diameter of 324mm and an inside diameter of 120mm, matching the OEM specifications for the BMW 328i and 330i. It features five bolt holes, each with a diameter of 14.5mm, ensuring secure mounting. The rotor’s nominal thickness is 22mm, with a discard thickness of 20.4mm, indicating when replacement is necessary to maintain safe braking. The height of 67.2mm ensures proper alignment with the brake caliper assembly. The vented design improves airflow to reduce heat buildup during braking, while the dimpled and slotted surface enhances pad contact and helps prevent brake fade.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on BMW 328i and 330i
• Improves braking performance under high heat conditions
• Reduces brake fade during aggressive or repeated braking
• Helps eliminate brake noise and vibration caused by uneven rotor surfaces
• Maintains proper rotor thickness for safe braking operation

Installation Notes and Tips

Ensure the rotor is compatible with your specific BMW 328i or 330i model year before installation. Clean the rotor surface to remove any protective coating before mounting. Torque the bolts to manufacturer specifications to avoid warping. It is recommended to replace brake pads when installing new rotors to ensure optimal braking performance. Check rotor thickness regularly and replace when it reaches the discard thickness of 20.4mm.

Quality Assurance and Warranty

Dynamite Friction manufactures this rotor to meet or exceed OEM standards for fit and function. The vented, dimpled, and slotted design is engineered for durability and consistent braking performance. Please refer to Dynamite Friction’s warranty policy for specific coverage details related to this part number 640-31118.