Centric 320.44021F Disc Brake Rotor - Front

Centric GCX Front Brake Rotor for Toyota 4Runner

The Centric GCX Elemental Protection Disc Brake Rotor, part number 320.44021F, is a front solid rotor for 1984-1985 Toyota 4Runner applications. It combines a fully coated disc finish with a coated hat finish to help resist corrosion on exposed surfaces while maintaining a smooth braking surface.

Built for the front axle of the Toyota 4Runner, this rotor measures 11.890 inches in outside diameter, 1.890 inches in overall height, and 0.492 inches nominal thickness. The rotor uses a 6-bolt mounting pattern, a 5.500-inch bolt circle, a 3.937-inch center hole diameter, and behind-the-hub disc mounting. Part number 320.44021F is a direct-fit option for drivers searching for a front brake rotor for 1984 Toyota 4Runner or 1985 Toyota 4Runner front brake service.

Key Features

• Fits 1984-1985 Toyota 4Runner, front
• Centric GCX Elemental Protection Disc Brake Rotors - Full Coating
• Part number 320.44021F
• Fully coated disc finish with coated hat finish
• Smooth, solid rotor design
• 6 mounting bolt holes with 5.500-inch bolt circle diameter
• Outside diameter: 11.890 inches; nominal thickness: 0.492 inches
• ABS tone ring not included; bearings not included

Product Details

The Centric GCX Elemental Protection line focuses on corrosion resistance across the rotor’s non-friction surfaces, making it a practical choice for front brake service on classic Toyota 4Runner models. This rotor uses a solid construction with a smooth surface type and behind-the-hub mounting layout. The coated hat and fully coated disc help protect the rotor from environmental exposure while preserving the braking surface where pad contact occurs. If you are replacing worn front rotors on a 1984-1985 Toyota 4Runner, 320.44021F provides the correct fitment and dimensions for the application.

Common Reasons to Replace

• Front brake pulsation from rotor wear or thickness variation
• Visible corrosion on the rotor hat or non-friction surfaces
• Brake noise caused by uneven rotor surfaces
• Reduced braking consistency from worn front rotors
• Service replacement for a 1984-1985 Toyota 4Runner front brake job

Installation Notes and Tips

Verify rotor dimensions, bolt pattern, and hub fitment before installation. Clean the hub mounting surface thoroughly to help the rotor seat evenly, and inspect pads, calipers, and hardware condition during service. Because this rotor is listed for front use only, confirm left-right axle placement by vehicle service procedure. This part cross-references no listed interchange numbers for the same application.

Quality Assurance

Centric GCX rotors are built with application-specific dimensions and protective coatings to support consistent fitment and corrosion resistance. Part number 320.44021F is specified for 1984-1985 Toyota 4Runner front brake service and follows the listed rotor measurements and mounting configuration.