Dynamite Friction 631-54031L Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-54031L) is engineered for reliable braking performance on select Ford, Lincoln, and Mercury vehicles. Designed specifically for models like the Ford Cougar, Lincoln Mark VIII, and Mercury Thunderbird, this rotor offers enhanced heat dissipation and consistent stopping power.

• Disc type: Vented disc brake rotor with drilled and slotted surface
• Nominal thickness: 18 mm with a discard thickness of 16.7 mm
• Overall diameter: 258 mm with a height of 45.5 mm
• Bolt pattern: 5 lug holes with 14.1 mm diameter and 108 mm bolt circle diameter
• Rust-resistant zinc silver hat finish and plain disc finish for durability
• Directional brake surface optimized for improved braking efficiency

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

The DFC Brake Rotor - Drilled and Slotted - Silver line from Dynamite Friction focuses on rotors that combine drilled holes and slots to improve brake pad bite and heat dissipation. This design helps reduce brake fade and maintain consistent braking performance under demanding conditions. The silver zinc coating on the rotor hat provides corrosion resistance, extending the rotor's service life.

Technical Specifications and Features

This vented rotor features a 258 mm outside diameter and a 64.5 mm center hole diameter, ensuring proper fitment and alignment on compatible vehicles. The drilled and slotted surface type enhances water and gas evacuation from the braking surface, which is critical for maintaining effective braking in wet or high-temperature environments. The rotor’s 5-bolt hole configuration with a 108 mm bolt circle diameter matches the factory specifications for Ford Cougar, Lincoln Mark VIII, and Mercury Thunderbird models. The zinc silver hat finish offers additional protection against rust, while the plain disc finish maintains a smooth braking surface.

Applications and Problem Solving

• Compatible with Ford Cougar, Lincoln Mark VIII, and Mercury Thunderbird models requiring a 258 mm vented rotor
• Addresses brake fade caused by excessive heat buildup during aggressive driving or towing
• Improves braking response in wet conditions by channeling water away from the rotor surface
• Reduces brake noise and vibration through the slotted and drilled design
• Prevents premature rotor corrosion with rust-resistant coating

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 16.7 mm before installation. Properly torque the 5 lug nuts to the manufacturer’s specifications using the 14.1 mm bolt hole diameter and 108 mm bolt circle diameter. Clean the rotor surface to remove any protective coating before mounting brake pads. Verify directional rotation of the rotor during installation to maintain optimal braking performance.

Quality Assurance and Warranty

Dynamite Friction manufactures this rotor to meet or exceed OEM standards for fit, form, and function. The rust-resistant zinc silver coating and vented design contribute to long-term durability. Warranty details are available from the manufacturer and should be reviewed prior to purchase.