Dynamite Friction 631-31117R Disc Brake Rotor - Rear Right

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31117R) is engineered for precise braking performance on select BMW models. Designed with a vented, directional surface, this rotor enhances heat dissipation and braking consistency for vehicles such as the BMW 320i xDrive and 330i xDrive.

• Vented disc brake rotor with drilled and slotted surface
• Nominal thickness of 20 mm and discard thickness of 18.4 mm
• Directional brake surface for optimized performance
• Zinc silver hat finish with rust-resistant coating
• Compatible with 5-lug bolt pattern, 120 mm bolt circle diameter
• Overall diameter of 300 mm and height of 66.3 mm

Detailed Product Features and Specifications

This DFC Brake Rotor - Drilled and Slotted - Silver is constructed with a vented design to improve airflow and reduce heat buildup during braking. The rotor features a drilled and slotted surface type, which helps evacuate gases, dust, and water, maintaining consistent pad contact and reducing brake fade. The rotor’s directional surface is engineered to optimize braking efficiency and performance on BMW vehicles.

The rotor’s nominal thickness is 20 mm, with a discard thickness of 18.4 mm, ensuring durability and safety throughout its service life. The zinc silver hat finish provides corrosion resistance, complemented by an overall rust-resistant coating to extend the rotor’s lifespan. The rotor fits vehicles with a 5-bolt hole pattern and a bolt circle diameter of 120 mm, with a bolt hole diameter of 16.8 mm, matching the specifications of various BMW models.

DFC Brake Rotor - Drilled and Slotted - Silver Product Line

The DFC Brake Rotor - Drilled and Slotted - Silver line from Dynamite Friction focuses on delivering rotors with enhanced heat dissipation and surface durability. This product line combines drilled holes and slots on a vented rotor design to improve braking performance under demanding conditions. The zinc silver hat finish and rust-resistant coating are standard features in this line, aimed at providing long-term reliability and corrosion protection.

Compatible BMW Models and Applications

• BMW 320i xDrive
• BMW 325xi
• BMW 328d xDrive, 328i, 328i GT xDrive, 328i xDrive, 328xi
• BMW 330e, 330i, 330i GT xDrive, 330i xDrive
• BMW 420i, 428i, 428i Gran Coupe, 428i xDrive, 428i xDrive Gran Coupe
• BMW 430i, 430i Gran Coupe, 430i xDrive, 430i xDrive Gran Coupe
• BMW X1

Common Issues Addressed by This Brake Rotor

• Brake fade caused by excessive heat buildup
• Uneven brake pad wear due to poor rotor surface design
• Corrosion and rust on rotor surfaces reducing braking efficiency
• Brake noise and vibration from warped or damaged rotors
• Reduced braking performance in wet conditions

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (18.4 mm) before installation
• Clean rotor surface and hub mounting area to prevent runout
• Use proper torque specifications for 5-lug bolts with 16.8 mm diameter
• Check compatibility with specific BMW model and year before installation
• Inspect brake pads and replace if worn to ensure optimal rotor performance

Quality Assurance and Warranty

Dynamite Friction manufactures the 631-31117R rotor to meet or exceed OEM specifications for fit, form, and function. The rust-resistant coating and zinc silver hat finish contribute to long-term durability. While specific warranty details are not provided, Dynamite Friction products typically undergo rigorous quality control to ensure reliability and consistent braking performance.