Dynamite Friction 631-31097R Disc Brake Rotor - Front Right

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31097R) is engineered for BMW models including the 535d, 535i, 640i, and ActiveHybrid 5 series. This vented disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Compatible with BMW 535d, 535d xDrive, 535i, 535i xDrive, 640i, 640i Gran Coupe, 640i xDrive, 640i xDrive Gran Coupe, and ActiveHybrid 5
• Directional slotted and drilled surface for improved brake pad bite and cooling
• Vented rotor design with 348 mm outside diameter for efficient heat management
• Zinc silver hat finish with rust-resistant coating for corrosion protection
• Nominal thickness of 30 mm and discard thickness of 28.4 mm for durability
• 5 bolt holes with 16.6 mm diameter and 120 mm bolt circle diameter
• Center hole diameter of 75 mm for precise fitment

Detailed Product Description

The DFC Brake Rotor - Drilled and Slotted - Silver from Dynamite Friction is a vented disc brake rotor designed to meet the braking demands of select BMW vehicles. Its 348 mm outside diameter and 66.5 mm overall height ensure compatibility with the specified models. The rotor’s surface features a directional pattern combining drilled holes and slots, which helps to reduce brake fade by improving heat dissipation and expelling gases and debris from the braking surface. The zinc silver hat finish and rust-resistant coating provide enhanced protection against corrosion, extending the rotor’s service life. With a nominal thickness of 30 mm and a discard thickness of 28.4 mm, this rotor maintains structural integrity under demanding conditions. The 5-bolt hole configuration with a 120 mm bolt circle diameter matches the wheel hub specifications of the compatible BMW models, ensuring a secure and precise installation.

Applications and Problem Solving

• Replaces worn or warped rotors on BMW 535d, 535i, 640i, and ActiveHybrid 5 models
• Addresses brake fade caused by excessive heat during aggressive driving or towing
• Improves braking response and pad bite with slotted and drilled surface design
• Prevents rust and corrosion in humid or salty environments with protective coating
• Restores proper rotor thickness to maintain safe braking performance

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (28.4 mm) before installation
• Clean rotor surface and hub mounting area to prevent uneven wear or vibration
• Use proper torque specifications for the 5 lug bolts with 16.6 mm diameter
• Check compatibility with vehicle’s brake caliper and hardware before installation
• Perform a bed-in procedure after installation to optimize rotor and pad performance

Quality Assurance and Warranty

Dynamite Friction manufactures the DFC Brake Rotor - Drilled and Slotted - Silver to meet industry standards for durability and performance. The rotor includes a rust-resistant coating and zinc silver hat finish to enhance longevity. While specific warranty details are not provided, Dynamite Friction products typically adhere to quality control measures to ensure reliable operation on compatible BMW models. Always consult product documentation or contact the manufacturer for warranty information.