Dynamite Friction 631-54003L Disc Brake Rotor - Rear Left

Overview of the DFC Brake Rotor - Drilled and Slotted - Silver

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-54003L) is engineered for reliable braking performance on select Ford, Mazda, and Mercury vehicles. Designed with a solid, directional rotor surface, this disc brake rotor offers enhanced heat dissipation and consistent stopping power for models like the Ford Escort, Mazda Miata, and Mercury Tracer.

• Part Number: 631-54003L
• Disc Type: Solid, drilled and slotted surface
• Disc Finish: Plain
• Hat Finish: Zinc silver with rust-resistant coating
• Nominal Thickness: 9 mm; Discard Thickness: 8 mm
• Outside Diameter: 251 mm
• Overall Height: 35 mm
• Bolt Hole Quantity: 4 with 13 mm diameter
• Bolt Circle Diameter: 100 mm
• Directional brake surface for optimized performance

Detailed Product Description

This DFC Brake Rotor - Drilled and Slotted - Silver is a solid disc rotor featuring a directional surface with both drilled holes and slots. The drilled and slotted design helps to reduce brake fade by improving heat dissipation and allowing gases and debris to escape during braking. The rotor’s plain disc finish combined with a zinc silver hat finish provides corrosion resistance, extending the rotor’s service life. With a nominal thickness of 9 mm and a discard thickness of 8 mm, this rotor maintains structural integrity under demanding conditions. The rotor’s 251 mm outside diameter and 35 mm overall height are engineered to match the specifications required for compatible vehicles.

Compatible Vehicles and Applications

This rotor is compatible with various Ford, Mazda, and Mercury models, including:

• Ford Escort
• Mazda Miata
• Mazda MX-3
• Mazda Protege
• Mercury Tracer

It is designed to replace worn or damaged rotors and restore braking efficiency on these vehicles.

Common Issues Addressed by This Rotor

• Brake fade caused by overheating during extended braking
• Uneven brake pad wear due to rotor surface imperfections
• Corrosion and rust buildup on rotor surfaces
• Vibration or pulsation during braking from warped rotors
• Reduced braking performance from worn or thin rotors

Installation Notes and Tips

Ensure the rotor surface and hub are clean and free of debris before installation. Verify that the rotor thickness is within the nominal and discard limits (9 mm nominal, 8 mm discard) to maintain safety and performance. Use the correct torque specifications for the 4 bolt holes (13 mm diameter) and confirm proper alignment with the 100 mm bolt circle diameter. Directional rotors must be installed with the correct rotation direction to ensure optimal performance.

Quality Assurance and Product Line Information

The DFC Brake Rotor - Drilled and Slotted - Silver is part of Dynamite Friction’s DFC product line, which focuses on delivering rotors with enhanced heat management and corrosion resistance. This rotor includes a rust-resistant zinc silver coating on the hat to protect against environmental damage. While no specific warranty information is provided, Dynamite Friction products are manufactured to meet or exceed OEM standards for fit and function, ensuring reliable braking performance for your Ford Escort, Mazda Miata, or Mercury Tracer.