Dynamite Friction 631-31138L Disc Brake Rotor - Rear Left

Reliable Brake Performance for BMW X5

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31138L) is engineered to provide consistent braking performance for your BMW X5. Designed with precision, this vented disc brake rotor offers enhanced heat dissipation and improved stopping power under demanding conditions.

• Disc type: Vented, drilled, and slotted for optimal cooling and debris removal
• Nominal thickness: 20 mm with a discard thickness of 18.4 mm
• Outside diameter: 324 mm for precise fitment
• Hat finish: Zinc silver coating for corrosion resistance
• Rust resistant coating applied to extend rotor life
• Directional brake surface design for improved braking efficiency
• 5 bolt holes with 16.6 mm diameter and 120 mm bolt circle diameter
• Center hole diameter: 75 mm to ensure proper hub alignment
• Overall height: 80.1 mm for exact fitment on BMW X5

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

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on delivering rotors that combine drilled and slotted surface technology with a corrosion-resistant zinc silver hat finish. This product line is designed to enhance braking performance by improving heat dissipation and reducing brake fade, making it suitable for BMW X5 owners seeking reliable and durable replacement rotors.

Detailed Product Description

This disc brake rotor features a vented design that allows air to flow through the rotor, helping to dissipate heat generated during braking. The drilled and slotted surface improves water and debris evacuation from the rotor surface, maintaining consistent brake pad contact and reducing the risk of brake fade. The directional brake surface ensures that the rotor is installed correctly for optimal performance. The zinc silver hat finish and rust resistant coating protect the rotor from corrosion, extending its service life. With precise dimensions including a 324 mm outside diameter and 80.1 mm overall height, this rotor is engineered specifically for the BMW X5, ensuring a proper fit and reliable braking performance.

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat buildup
• Uneven brake pad wear due to rotor surface imperfections
• Corrosion and rust on brake rotors reducing lifespan
• Reduced braking efficiency in wet or debris-filled conditions
• Vibration or noise from warped or damaged rotors

Installation Notes and Tips

Ensure the rotor is installed with the directional surface facing the correct rotation direction as indicated. Verify that the bolt hole pattern (5 holes, 16.6 mm diameter, 120 mm bolt circle) matches your BMW X5 hub. Clean the rotor surface before installation to remove any protective coatings or residues. Check the discard thickness of 18.4 mm to determine when replacement is necessary to maintain safe braking performance.

Quality Assurance

Dynamite Friction manufactures this rotor to meet or exceed OEM specifications for the BMW X5. The rust resistant coating and zinc silver hat finish contribute to long-term durability. While no specific warranty information is provided, the rotor is designed for reliable performance and longevity under normal operating conditions.