Dynamite Friction 631-54171L Disc Brake Rotor - Front Left

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-54171L) is engineered for reliable braking performance on select Ford and Mazda trucks and SUVs. Designed with a vented, directional surface, this rotor enhances heat dissipation and braking consistency for vehicles like the Ford Ranger and Mazda B3000.

• Vented disc brake rotor with drilled and slotted surface
• Directional brake surface for optimized performance
• Rust-resistant zinc silver hat finish
• Nominal thickness of 26 mm with discard thickness at 24.5 mm
• Fits 5-lug bolt pattern with 114.3 mm bolt circle diameter
• Outside diameter of 305 mm and overall height of 66.3 mm
• Compatible with Ford B3000, B4000, Explorer Sport, Explorer Sport Trac, and Ranger models

Detailed Product Features and Specifications

This DFC Brake Rotor from Dynamite Friction features a vented design that improves airflow to reduce heat buildup during braking. The drilled and slotted surface helps evacuate gases, dust, and water, contributing to consistent brake pad contact and improved stopping power. The rotor's directional surface is engineered to optimize braking efficiency when installed correctly. The zinc silver coating on the hat provides corrosion resistance, extending the rotor's service life. With a nominal thickness of 26 mm and a discard thickness of 24.5 mm, this rotor meets precise wear limits to maintain safety and performance. The 5-bolt hole configuration with a 114.3 mm bolt circle diameter ensures proper fitment on compatible Ford and Mazda models.

About the DFC Brake Rotor - Drilled and Slotted - Silver Line

The DFC Brake Rotor - Drilled and Slotted - Silver product line by Dynamite Friction focuses on rotors that combine drilled holes and slots with a corrosion-resistant finish. This line is designed to provide enhanced heat dissipation and improved braking response for trucks and SUVs requiring durable, vented rotors. The silver zinc coating on the rotor hat adds protection against rust, making it suitable for vehicles exposed to varying weather conditions.

Applications and Problem Solving

• Reduces brake fade caused by excessive heat during towing or heavy braking
• Improves wet weather braking by channeling water away from the rotor surface
• Minimizes brake dust buildup for cleaner rotor and pad contact
• Prevents rust and corrosion on the rotor hat for longer service life
• Restores proper braking performance on Ford Ranger and Mazda B4000 models

Installation Notes and Tips

Ensure the rotor is installed with the directional surface oriented correctly according to the vehicle’s rotation direction. Verify that the bolt hole pattern matches the vehicle’s hub (5 lug, 114.3 mm bolt circle diameter). Measure rotor thickness before installation to confirm it meets or exceeds the discard thickness of 24.5 mm. Properly torque lug nuts to manufacturer specifications to avoid rotor warping.

Quality Assurance and Warranty

Dynamite Friction manufactures this rotor to meet or exceed OEM specifications for fit, form, and function. The rust-resistant coating and vented design contribute to durability and consistent braking performance. Warranty details are provided by the manufacturer and should be reviewed prior to purchase.