Dynamite Friction 644-31118 Disc Brake Rotor - Rear

Overview of Dynamite Friction DFC GEOSPEC Coated Rotor

The Dynamite Friction DFC GEOSPEC Coated Rotor - Dimpled and Slotted (part number 644-31118) is engineered for BMW 328i and 330i models. This vented disc brake rotor offers enhanced heat dissipation and consistent braking performance under demanding conditions.

• Nominal thickness: 22 mm
• Discard thickness: 20.4 mm
• Outside diameter: 324 mm
• Inside diameter: 120 mm
• Bolt hole diameter: 14.5 mm
• Bolt hole quantity: 5
• Height: 67.2 mm
• Vented rotor design for improved cooling
• Dimpled and slotted surface for better pad bite and debris removal

Detailed Product Description

This disc brake rotor is designed specifically for BMW 328i and 330i vehicles, ensuring precise fitment and reliable braking performance. The rotor features a vented design that helps dissipate heat more effectively during braking, reducing the risk of brake fade. With a nominal thickness of 22 mm and a discard thickness of 20.4 mm, this rotor maintains structural integrity and safety throughout its service life. The 324 mm outside diameter and 120 mm inside diameter are optimized for the braking system of these BMW models. The rotor’s dimpled and slotted surface enhances pad contact, improves water and debris evacuation, and contributes to consistent stopping power.

DFC GEOSPEC Coated Rotor - Dimpled and Slotted Product Line

The DFC GEOSPEC Coated Rotor - Dimpled and Slotted line by Dynamite Friction is designed to provide improved braking performance through advanced surface treatments. The coating helps resist corrosion, extending rotor life, while the dimpled and slotted design improves pad bite and heat dissipation. This product line is suitable for drivers seeking reliable, consistent braking performance tailored to specific vehicle applications like the BMW 328i and 330i.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on BMW 328i and 330i
• Improves braking response and reduces brake fade under heavy use
• Helps eliminate brake noise caused by uneven rotor surfaces
• Addresses rotor corrosion issues with protective coating
• Enhances braking performance in wet or debris-prone conditions

Installation Notes and Tips

Ensure the rotor is installed on compatible BMW 328i or 330i models with a 5-bolt pattern and matching bolt hole diameter of 14.5 mm. Verify rotor thickness before installation; replace if below the discard thickness of 20.4 mm. Properly torque bolts to manufacturer specifications to avoid rotor warping. It is recommended to inspect brake pads and hardware during rotor replacement for optimal braking system performance.

Quality Assurance

Dynamite Friction rotors undergo rigorous quality control to meet OEM standards for fitment and performance. The vented rotor design and coating contribute to durability and corrosion resistance. While no specific warranty information is provided, Dynamite Friction products are manufactured to maintain consistent braking performance and safety for BMW 328i and 330i vehicles.