Dynamite Friction 633-80074L Disc Brake Rotor - Front Left

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

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Black (part number 633-80074L) is engineered for reliable braking performance on Fiat 124 Spider and Mazda MX-5 Miata models. This vented disc brake rotor features a directional, slotted, and drilled surface designed to enhance heat dissipation and maintain consistent stopping power.

• Compatible with Fiat 124 Spider and Mazda MX-5 Miata
• Part number: 633-80074L
• Vented disc brake rotor with directional drilled and slotted surface
• Nominal thickness: 22 mm; discard thickness: 20 mm
• Overall height: 44.2 mm; outside diameter: 280 mm
• Hat finish in zinc black with rust-resistant coating
• 4 bolt holes with 100 mm bolt circle diameter
• Center hole diameter: 55 mm; stud/lug hole diameter: 13.3 mm

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

The DFC Brake Rotor - Drilled and Slotted - Black line by Dynamite Friction focuses on rotors that combine drilled holes and slots to improve brake pad bite and reduce heat buildup. The black zinc coating on the hat provides corrosion resistance, extending rotor life. This product line is designed to meet the specific braking demands of performance-oriented vehicles like the Fiat 124 Spider and Mazda MX-5 Miata, offering a balance of durability and enhanced braking response.

Technical Description and Specifications

This disc brake rotor is vented to allow better airflow and heat dissipation during braking, which helps prevent brake fade under demanding conditions. The directional surface features both drilled holes and slots, which aid in removing brake dust, gases, and water from the rotor surface, improving pad contact and braking efficiency. The rotor has a nominal thickness of 22 mm and a discard thickness of 20 mm, ensuring safe replacement intervals. The zinc black hat finish and rust-resistant coating protect against corrosion, maintaining rotor integrity over time. With 4 bolt holes arranged on a 100 mm bolt circle diameter, this rotor fits securely on compatible Fiat and Mazda models.

Applications and Problem Solving

• Improves braking performance on Fiat 124 Spider and Mazda MX-5 Miata
• Reduces brake fade during spirited driving or heavy braking
• Helps prevent rotor warping caused by excessive heat
• Minimizes brake dust accumulation for cleaner braking surfaces
• Protects against rust and corrosion for longer rotor life

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 20 mm before installation. Clean the rotor surface to remove any protective coatings or contaminants prior to mounting. Verify bolt hole alignment with the vehicle’s hub using the 4-bolt, 100 mm bolt circle pattern. Properly torque lug nuts to manufacturer specifications to avoid rotor warping. Directional rotors must be installed with the correct rotation direction for optimal performance.

Quality Assurance and Warranty

Dynamite Friction manufactures the 633-80074L rotor to meet industry standards for durability and performance. The rust-resistant coating and zinc black hat finish contribute to long-term reliability. Warranty details are provided by the manufacturer and should be consulted for specific coverage information.