Dynamite Friction 631-54122R Disc Brake Rotor - Front Right

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-54122R) is engineered for reliable braking performance on select Ford and Mazda vehicles. Designed specifically for models like the Ford Bronco II, Ford Explorer, and Mazda Navajo, this rotor combines vented construction with a directional, drilled and slotted surface to enhance heat dissipation and braking consistency.

• Compatible with Ford Bronco II, Ford Explorer, and Mazda Navajo
• Part Number: 631-54122R
• Vented disc brake rotor with drilled and slotted surface
• Nominal thickness of 22 mm and discard thickness of 20.6 mm
• Directional braking surface for optimized performance
• Rust-resistant zinc silver hat finish with plain disc finish
• 5 bolt holes with 1/2-20 diameter and 114.3 mm bolt circle diameter
• Overall diameter of 261 mm and height of 105.3 mm

Product Line Details: DFC Brake Rotor - Drilled and Slotted - Silver

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on rotors that feature a combination of drilled holes and slots on the braking surface. This design improves heat dissipation and helps reduce brake fade under demanding conditions. The silver zinc coating on the rotor hat provides corrosion resistance, extending the rotor's service life. This product line is tailored for vehicles requiring vented rotors with directional braking surfaces to maintain consistent stopping power.

Technical Specifications and Features

This disc brake rotor is vented to allow better airflow and heat management during braking. The rotor's surface is both drilled and slotted, which aids in removing brake dust, gases, and water from the contact area, improving brake pad bite and reducing the risk of glazing. The rotor has a nominal thickness of 22 mm and a discard thickness of 20.6 mm, ensuring it meets safety standards for replacement. The zinc silver hat finish offers rust resistance, while the plain disc finish maintains a clean braking surface. The rotor features five bolt holes with a 1/2-20 diameter and a bolt circle diameter of 114.3 mm, matching the stud/lug hole circle diameter for proper fitment.

Applications and Problem Solving

• Replacement rotor for worn or warped rotors on Ford Bronco II, Explorer, and Mazda Navajo
• Improves heat dissipation to reduce brake fade during heavy braking
• Helps prevent brake pad glazing and maintains consistent braking performance
• Rust-resistant coating protects against corrosion in humid or wet environments
• Directional design supports optimal braking efficiency and rotor longevity

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 20.6 mm before installation. Clean the rotor surface to remove any protective coating or debris prior to mounting. Verify the bolt hole pattern matches the vehicle’s hub (5 bolt holes, 1/2-20 diameter, 114.3 mm bolt circle). Properly torque lug nuts to manufacturer specifications to avoid rotor warping. It is recommended to replace brake pads when installing new rotors for optimal performance.

Quality Assurance

Dynamite Friction manufactures the 631-54122R rotor to meet or exceed OEM specifications for the Ford Bronco II, Explorer, and Mazda Navajo. The rust-resistant zinc silver finish and vented rotor design contribute to durability and consistent braking performance. Warranty information is available through Dynamite Friction and should be confirmed at the point of purchase.