Dynamite Friction 830-31047R Disc Brake Rotor - Rear Right

Overview of Dynamite Friction DFC Geoperformance Rotor

The Dynamite Friction DFC Geoperformance Rotor - Drilled and Slotted (part number 830-31047R) is engineered for BMW 323i, 325Ci, 325i, 328Ci, and 328i models. This vented disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Compatible with BMW 323i, 325Ci, 325i, 328Ci, and 328i
• Part number: 830-31047R
• Directional, slotted and drilled surface for improved braking
• Vented rotor design for heat management
• Rust resistant coating for durability
• Geospec silver grey hat finish
• 5 bolt holes with 14.6 mm diameter and 120 mm bolt circle diameter
• Outside diameter: 294 mm; Overall height: 59.7 mm
• Nominal thickness: 19 mm; Discard thickness: 17.4 mm

Detailed Product Features and Specifications

This Dynamite Friction rotor is part of the DFC Geoperformance Rotor - Drilled and Slotted line, which focuses on delivering reliable braking performance with enhanced heat dissipation and surface durability. The rotor’s vented design allows for better airflow, reducing the risk of brake fade during demanding driving conditions. The directional slotted and drilled surface helps to evacuate gases, dust, and water, maintaining consistent brake pad contact and improving stopping power.

The rotor features a plain disc finish combined with a Geospec silver grey hat finish, providing corrosion resistance and a clean appearance. The rust resistant coating further extends the rotor’s lifespan by protecting against environmental elements. With a 5-lug bolt pattern and precise dimensions including a 294 mm outside diameter and 59.7 mm overall height, this rotor is engineered to meet OEM specifications for the listed BMW models.

Applications and Problem Solving

• Replaces worn or warped rotors on BMW 323i, 325Ci, 325i, 328Ci, and 328i
• Addresses brake fade caused by overheating during aggressive driving
• Improves braking consistency in wet or dusty conditions
• Reduces vibration and noise from uneven rotor surfaces
• Prevents premature rotor corrosion and surface degradation

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 17.4 mm before installation. Clean the rotor surface to remove any protective coatings or residues prior to mounting. Verify the 5-lug bolt pattern with 14.6 mm diameter holes and 120 mm bolt circle diameter matches your vehicle’s hub. Proper torque specifications should be followed to avoid rotor warping. It is recommended to replace brake pads simultaneously for optimal performance.

Quality Assurance and Warranty

Dynamite Friction manufactures the DFC Geoperformance Rotor - Drilled and Slotted to meet or exceed OEM standards for fit, form, and function. The rotor includes a rust resistant coating and durable finishes to ensure long service life. Warranty details are provided by the manufacturer and should be confirmed at the time of purchase.