Dynamite Friction 631-31028L Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31028L) is engineered for BMW models including the 318i, 318is, 323i, 323is, 325i, 325is, 328i, and 328is. This solid disc brake rotor features a directional, drilled and slotted surface designed to enhance braking performance and heat dissipation.

• Part Number: 631-31028L
• Compatible with BMW 318i, 318is, 323i, 323is, 325i, 325is, 328i, 328is
• Disc Type: Solid, drilled and slotted
• Nominal Thickness: 10 mm; Discard Thickness: 8.4 mm
• Outside Diameter: 280 mm; Overall Height: 60.1 mm
• Bolt Hole Quantity: 5; Bolt Hole Diameter: 15 mm; Bolt Circle Diameter: 120 mm
• Hat Finish: Zinc silver with rust-resistant coating
• Directional brake surface for optimized performance

Detailed Product Description

The DFC Brake Rotor - Drilled and Slotted - Silver from Dynamite Friction is designed to meet the braking demands of select BMW vehicles. This rotor features a solid construction with a 280 mm outside diameter and a nominal thickness of 10 mm, ensuring durability and consistent braking response. The drilled and slotted surface improves heat dissipation and helps reduce brake fade under heavy use, while the directional design optimizes water and debris evacuation from the braking surface.

The rotor’s hat is finished in zinc silver and includes a rust-resistant coating to protect against corrosion, extending the rotor’s service life. With a bolt hole pattern of 5 holes at 15 mm diameter and a bolt circle diameter of 120 mm, this rotor is engineered for precise fitment on compatible BMW models. The center hole diameter measures 75 mm, matching OEM specifications for proper hub alignment.

DFC Brake Rotor - Drilled and Slotted - Silver Product Line

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on providing rotors with enhanced surface features such as drilling and slotting to improve braking efficiency and thermal management. This product line is designed for drivers seeking rotors that maintain performance under demanding conditions while offering corrosion resistance and reliable fitment for specific vehicle applications.

Applications and Problem Solving

• Reduces brake fade during aggressive or prolonged braking
• Improves heat dissipation to maintain consistent braking performance
• Helps evacuate water and debris for safer braking in wet conditions
• Prevents rust and corrosion with zinc silver hat finish and coating
• Restores OEM braking feel and fitment on compatible BMW models

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness of 8.4 mm before installation
• Verify bolt hole pattern and center hole diameter match vehicle specifications
• Clean rotor surface and hub mounting area before installation to prevent uneven wear
• Torque lug nuts to manufacturer specifications to avoid rotor warping
• Inspect brake pads for wear and replace if necessary when installing new rotors

Quality Assurance

Dynamite Friction manufactures the 631-31028L rotor to meet strict quality standards, including rust-resistant coatings and precise machining for fitment accuracy. While no specific warranty information is provided, the product is designed to meet OEM specifications for the listed BMW models, ensuring reliable performance and durability.