Dynamite Friction 830-31064L Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC Geoperformance Rotor

The Dynamite Friction DFC Geoperformance Rotor - Drilled and Slotted (part number 830-31064L) is engineered for BMW models including the 535i, 545i, 550i, 645Ci, and 650i. This vented disc brake rotor combines drilled and slotted surface features with a rust-resistant coating to enhance braking performance and durability.

• Nominal thickness: 24 mm with a discard thickness of 22.4 mm
• Vented rotor design for improved heat dissipation
• Directional drilled and slotted surface for enhanced brake pad bite and debris removal
• Plain disc finish with Geospec silver grey hat finish
• Rust-resistant coating to reduce corrosion
• 5 bolt holes with 14.5 mm diameter and 120 mm bolt circle diameter
• Outside diameter of 345 mm and overall height of 63.2 mm
• Center hole diameter of 75 mm for precise fitment

DFC Geoperformance Rotor - Drilled and Slotted Product Line

The DFC Geoperformance Rotor - Drilled and Slotted line by Dynamite Friction is designed to provide reliable braking performance with enhanced heat management. The combination of drilled holes and slots on the rotor surface helps to reduce brake fade by allowing gases and heat to escape more efficiently. This product line focuses on maintaining consistent braking under demanding conditions while offering corrosion resistance through a specialized coating.

Detailed Product Description

This disc brake rotor is specifically designed for select BMW models such as the 535i, 545i, 550i, 645Ci, and 650i, ensuring precise fitment and optimal braking performance. The rotor features a vented design that improves airflow and heat dissipation, which is critical for maintaining brake efficiency during extended use. The directional drilled and slotted surface enhances pad bite and helps to clear water, dust, and debris from the braking surface. The rotor’s nominal thickness of 24 mm and discard thickness of 22.4 mm provide a balance between durability and performance. Additionally, the rust-resistant coating and Geospec silver grey hat finish contribute to long-term corrosion protection and aesthetic appeal.

Common Applications and Issues Addressed

• Replacement for worn or warped rotors on compatible BMW 5 and 6 Series models
• Improves braking response and reduces brake fade under heavy use
• Helps prevent rotor corrosion and surface rust
• Enhances braking performance in wet or dusty conditions
• Maintains consistent braking feel during spirited driving or towing

Installation Notes and Tips

Ensure the rotor is compatible with your specific BMW model and verify the bolt pattern matches your vehicle’s hub. Clean the rotor surface before installation to remove any protective coatings or residues. Use proper torque specifications for the 5 lug bolts (14.5 mm diameter, 120 mm bolt circle diameter) to avoid warping. It is recommended to replace brake pads when installing new rotors to ensure optimal performance.

Quality Assurance and Warranty

Dynamite Friction manufactures the 830-31064L rotor to meet or exceed OEM specifications for fit, form, and function. The rust-resistant coating and vented design contribute to the rotor’s durability and longevity. Warranty details are provided by the manufacturer and should be confirmed at the time of purchase.