Raybestos 66576 Disc Brake Rotor - Front

Reliable Vented Disc Brake Rotor for Ford, Mazda, and Mercury Trucks

The Raybestos Specialty - Truck Disc Brake Rotor 66576 is engineered to meet the braking demands of Ford, Mazda, and Mercury trucks and SUVs. Designed as a vented rotor with precise dimensions, it ensures consistent performance and durability for models like the Ford Ranger, Mazda B3000, and Mercury Mountaineer.

• Vented disc brake rotor for improved heat dissipation
• Overall height: 2.590 inches (65.800 mm)
• Outside diameter: 11.260 inches (286.000 mm)
• Nominal thickness: 1.025 inches (26.050 mm)
• Discard thickness: 0.965 inches (24.500 mm)
• 5 mounting bolt holes with 4.500 inch (114.300 mm) bolt circle diameter
• Center hole diameter: 2.837 inches (72.050 mm)
• Conventional rotor type compatible with drum-in-hat setups

Detailed Specifications and Product Line Information

This Raybestos disc brake rotor, part number 66576, belongs to the Specialty - Truck product line, which focuses on components tailored for truck and SUV applications. The vented design helps reduce brake fade by allowing better airflow, which is critical for heavier vehicles like the Ford Explorer and Mazda B4000. The rotor’s nominal thickness of 1.025 inches and discard thickness of 0.965 inches provide a clear service life indicator to maintain safe braking performance. Its 5-lug mounting pattern and conventional rotor style make it compatible with a range of Ford, Mazda, and Mercury models, ensuring a precise fit and reliable operation.

Applications and Common Issues Addressed

• Replacement for worn or warped rotors causing brake pulsation
• Upgrading from solid to vented rotors for improved heat management
• Resolving brake noise and vibration issues on Ford Ranger and Mercury Mountaineer
• Restoring proper rotor thickness to maintain braking efficiency
• Ensuring compatibility with 5-lug bolt patterns on Mazda B3000 and B4000

Installation Notes and Tips

When installing the Raybestos 66576 rotor, ensure the mounting surface is clean and free of rust or debris to prevent uneven rotor seating. Verify the rotor thickness before installation; replace if below the discard thickness of 0.965 inches. Use proper torque specifications on the 5 mounting bolts to avoid rotor warping. This rotor is designed for conventional drum-in-hat brake systems, so confirm compatibility with your vehicle’s brake setup prior to installation.

Quality Assurance and Warranty

Raybestos Specialty - Truck rotors are manufactured to meet or exceed OEM standards for durability and performance. Each rotor undergoes strict quality control to ensure dimensional accuracy and material integrity. While specific warranty details for part number 66576 should be confirmed with the supplier, Raybestos typically offers limited warranties covering defects in materials and workmanship.