Dynamite Friction 830-31168L Disc Brake Rotor - Front Left

Overview of Dynamite Friction DFC Geoperformance Rotor

The Dynamite Friction DFC Geoperformance Rotor - Drilled and Slotted (part number 830-31168L) is engineered for precision braking performance on select BMW models. Designed with a vented, directional surface, this rotor enhances heat dissipation and braking consistency under demanding conditions.

• Compatible with BMW 330i, 330i xDrive, 430i, 430i Gran Coupe, 430i xDrive, 530e, 530e xDrive, 530i, 530i xDrive, 540i, 540i xDrive, i4, iX3, X3, X5, and X6
• Directional drilled and slotted surface for improved brake pad bite and debris removal
• Vented rotor design with 348 mm outside diameter for enhanced cooling
• Rust resistant coating with Geospec silver grey hat finish for corrosion protection
• Nominal thickness of 30 mm and discard thickness of 28.4 mm for reliable wear limits
• 5 bolt holes with 16.7 mm diameter and 112 mm bolt circle diameter for secure fitment

DFC Geoperformance Rotor - Drilled and Slotted Product Line

The DFC Geoperformance Rotor - Drilled and Slotted line by Dynamite Friction focuses on rotors that combine drilled holes and precision slots to optimize braking performance. This design improves heat dissipation and reduces brake fade, while the directional surface pattern ensures consistent pad contact and effective water and debris evacuation. The rotors in this line are vented to further enhance cooling, making them suitable for both daily driving and spirited use on compatible BMW vehicles.

Technical Specifications and Features

This disc brake rotor features a 348 mm outside diameter and a height of 66.6 mm, designed to meet the exacting standards of BMW braking systems. The rotor is vented to allow airflow between the rotor faces, reducing heat buildup during braking. The directional drilled and slotted surface improves pad bite and helps maintain clean contact surfaces by channeling away dust and gases. The rotor’s hat is finished in Geospec silver grey, providing corrosion resistance along with a rust resistant coating applied to the entire rotor surface. The 5 bolt holes with a 16.7 mm diameter and a 112 mm bolt circle diameter ensure precise mounting compatibility with the specified BMW models.

Applications and Problem Solving

• Reduces brake fade during extended or aggressive braking
• Improves braking response and pad bite on BMW 330i and 530i models
• Helps prevent rotor warping caused by excessive heat buildup
• Minimizes corrosion and rust formation for longer rotor life
• Maintains consistent braking performance in wet or debris-prone conditions

Installation Notes and Tips

Ensure the rotor is installed on compatible BMW models listed in the fitment section. Verify the rotor thickness before installation; replace if below the discard thickness of 28.4 mm. Clean the rotor surface to remove any protective coatings or residues before mounting. Use proper torque specifications for the 5 lug bolts to avoid warping. Directional rotors must be installed with the rotation arrow pointing in the correct direction of wheel rotation for optimal performance.

Quality Assurance

Dynamite Friction rotors undergo rigorous quality control to meet OEM standards for fit, finish, and performance. The rust resistant coating and Geospec silver grey hat finish provide added durability against corrosion. While no specific warranty information is provided, Dynamite Friction products are manufactured to maintain consistent braking performance and reliability on compatible BMW vehicles.