Dynamite Friction 631-31088L Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31088L) is engineered for BMW 125i and 128i models. This vented disc brake rotor features a directional, slotted, and drilled surface designed to enhance braking performance and heat dissipation.

• Compatible with BMW 125i and 128i models
• Part number: 631-31088L
• Vented disc brake rotor with drilled and slotted surface
• Nominal thickness: 20 mm; discard thickness: 18.4 mm
• Overall height: 76.2 mm; outside diameter: 300 mm
• 5 bolt holes with 14.5 mm diameter and 120 mm bolt circle diameter
• Zinc silver hat finish with rust-resistant coating
• Directional brake surface for optimized performance

Detailed Product Features and Specifications

This DFC Brake Rotor - Drilled and Slotted - Silver is designed with a vented rotor type to improve heat dissipation during braking, reducing the risk of brake fade. The rotor’s surface combines drilled holes and slots, which help evacuate gases, dust, and water, maintaining consistent braking performance under various conditions. The rotor has a nominal thickness of 20 mm and a discard thickness of 18.4 mm, ensuring durability and safety throughout its service life.

The rotor’s hat is finished in zinc silver, providing corrosion resistance, complemented by an overall rust-resistant coating to extend the rotor’s lifespan. With a 300 mm outside diameter and 76.2 mm overall height, this rotor fits precisely on BMW 125i and 128i models requiring a 5-lug bolt pattern with 14.5 mm bolt hole diameter and 120 mm bolt circle diameter. The directional brake surface is engineered to optimize braking efficiency and rotor longevity.

About the DFC Brake Rotor - Drilled and Slotted - Silver Line

The DFC Brake Rotor - Drilled and Slotted - Silver product line by Dynamite Friction focuses on rotors that combine drilled and slotted surfaces with corrosion-resistant finishes. This line is designed to provide reliable braking performance for specific vehicle applications, such as the BMW 125i and 128i, by enhancing heat dissipation and maintaining rotor integrity under demanding conditions.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on BMW 125i and 128i
• Improves braking response and reduces brake fade during aggressive driving
• Helps prevent rust and corrosion on brake components
• Addresses issues with brake noise and vibration caused by uneven rotor surfaces
• Maintains consistent braking performance in wet or dusty conditions

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 18.4 mm before installation. Clean the rotor surface to remove any protective coatings or residues prior to mounting. Verify compatibility with the vehicle’s 5-lug bolt pattern and 120 mm bolt circle diameter. Proper torque specifications should be followed when securing the rotor to avoid warping or uneven wear.

Quality Assurance and Warranty

Dynamite Friction manufactures the 631-31088L rotor with rust-resistant coatings and zinc silver hat finish to enhance durability. While specific warranty details are not provided, the rotor meets OEM fitment standards for BMW 125i and 128i models, ensuring reliable performance and safety.