Dynamite Friction 830-31046L Disc Brake Rotor - Front Left

Overview of Dynamite Friction DFC Geoperformance Rotor

The Dynamite Friction DFC Geoperformance Rotor - Drilled and Slotted (part number 830-31046L) is engineered for BMW models including the 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4. This vented disc brake rotor combines drilled and slotted surface features to enhance braking performance and heat dissipation.

• Disc type: Vented disc brake rotor with drilled and slotted surface
• Nominal thickness: 22 mm with discard thickness at 20.4 mm
• Outside diameter: 300 mm for optimal braking surface
• Directional brake surface design for improved water and debris evacuation
• Hat finish in Geospec silver grey with rust-resistant coating
• 5 bolt holes with 14.6 mm diameter and 120 mm bolt circle diameter
• Center hole diameter: 79 mm
• Overall height: 51.5 mm

DFC Geoperformance Rotor - Drilled and Slotted Product Line

The DFC Geoperformance Rotor - Drilled and Slotted line by Dynamite Friction is designed to provide enhanced braking efficiency through a combination of drilled holes and precision slots. These features help reduce brake fade by improving heat dissipation and allowing gases and debris to escape from the rotor surface. The directional surface pattern further aids in maintaining consistent braking performance under various driving conditions. This rotor line is suitable for drivers seeking reliable stopping power with a focus on durability and performance.

Detailed Product Description

This disc brake rotor is specifically designed for select BMW vehicles, including the 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4 models. The rotor features a vented design that promotes airflow to reduce heat buildup during braking. Measuring 300 mm in outside diameter and 51.5 mm in overall height, it provides a substantial braking surface area. The rotor’s nominal thickness is 22 mm, with a discard thickness of 20.4 mm, ensuring it meets safety and performance standards. The drilled and slotted surface type is directional, which helps channel water and brake dust away from the rotor surface, improving braking consistency in wet or dusty conditions. The hat is finished in Geospec silver grey and includes a rust-resistant coating to extend the rotor’s service life. The rotor mounts with 5 bolt holes, each 14.6 mm in diameter, arranged on a 120 mm bolt circle diameter, matching the factory specifications for the listed BMW models.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on BMW 3 Series and Z models
• Improves heat dissipation to reduce brake fade during spirited driving
• Enhances braking performance in wet or dusty environments with directional slotted and drilled design
• Addresses rotor corrosion issues with rust-resistant coating
• Maintains factory fitment and safety standards for specified BMW models

Installation Notes and Tips

Ensure the rotor is installed on compatible BMW models including 323i, 325Ci, 325i, 325xi, 328Ci, 328i, Z3, and Z4. Verify the bolt hole pattern and rotor dimensions match the vehicle specifications. Clean the rotor surface before installation to remove any protective coatings or residues. Use proper torque specifications for the 5 lug bolts (14.6 mm diameter) on a 120 mm bolt circle diameter. It is recommended to inspect brake pads and other braking components during rotor replacement to ensure optimal system performance.

Quality Assurance

Dynamite Friction manufactures the 830-31046L rotor to meet OEM standards for fit, form, and function. The rust-resistant coating and precision machining contribute to durability and consistent braking performance. While specific warranty details are not provided, Dynamite Friction products typically adhere to industry quality controls to ensure reliability and safety for BMW brake system applications.