Dynamite Friction 654-31190D Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC GEOSPEC Coated Rotor - Dimpled

The Dynamite Friction DFC GEOSPEC Coated Rotor - Dimpled (part number 654-31190D) is engineered for BMW models including the 840i, 840i Gran Coupe, 840i xDrive, 840i xDrive Gran Coupe, M850i xDrive, M850i xDrive Gran Coupe, and X5. This disc brake rotor features a directional dimpled surface designed to enhance braking performance and heat dissipation.

• Directional dimpled surface for improved brake pad contact and heat management
• Geospec silver grey hat finish for corrosion resistance and durability
• Rust resistant coating to extend rotor lifespan
• Plain disc finish for consistent braking performance
• Outside diameter of 398 mm suitable for specified BMW models
• Discard thickness of 26.4 mm indicating minimum safe rotor thickness

Details on the DFC GEOSPEC Coated Rotor - Dimpled Product Line

The DFC GEOSPEC Coated Rotor - Dimpled line by Dynamite Friction focuses on rotors with specialized coatings and surface treatments to improve longevity and braking efficiency. The Geospec silver grey hat finish provides enhanced rust resistance, while the dimpled surface pattern is designed to optimize brake pad engagement and heat dissipation. This product line is tailored for drivers seeking reliable, durable rotors compatible with high-performance BMW vehicles.

Product Features and Specifications

This disc brake rotor has a 398 mm outside diameter and a plain disc finish that ensures consistent braking under various conditions. The directional dimpled surface improves water and debris dispersion, reducing brake fade during aggressive driving or wet conditions. The rust resistant coating on the rotor extends service life by protecting against corrosion, especially important for vehicles exposed to harsh environments. The discard thickness of 26.4 mm provides a clear maintenance guideline to ensure safety and performance.

Applications and Problem Solving

• Compatible with BMW 840i, 840i Gran Coupe, 840i xDrive, 840i xDrive Gran Coupe, M850i xDrive, M850i xDrive Gran Coupe, and X5 models
• Addresses brake fade caused by heat buildup during extended braking
• Reduces corrosion-related rotor degradation for longer service intervals
• Improves braking consistency in wet or debris-prone conditions
• Maintains optimal braking performance with clear discard thickness specification

Installation Notes and Tips

Ensure the rotor is installed with the directional dimpled surface oriented correctly according to the vehicle’s rotation direction. Verify that the rotor thickness is above the discard thickness of 26.4 mm before installation. Clean the rotor surface to remove any protective coatings or residues prior to mounting. Use proper torque specifications for lug nuts to avoid rotor warping.

Quality Assurance and Warranty

Dynamite Friction rotors are manufactured to meet OEM standards for fitment and performance. The rust resistant coating and Geospec finish contribute to extended rotor life and consistent braking. While specific warranty details are not provided, Dynamite Friction products typically adhere to industry quality controls to ensure reliability and safety for BMW vehicles.