Centric 320.66003F Disc Brake Rotor - Front

Overview of Centric GCX Elemental Protection Disc Brake Rotors

The Centric GCX Elemental Protection Disc Brake Rotors - Full Coating provide reliable braking performance for heavy-duty trucks. Designed specifically for Chevrolet, Dodge, and GMC models such as the K30, K3500, V30, V3500, W250, and W350, these rotors offer durability and corrosion resistance through a full coating finish.

• Part Number: 320.66003F
• Fully coated disc and hat finish for enhanced corrosion protection
• Vented rotor design with straight vane style for improved heat dissipation
• Nominal thickness of 1.535 inches (38.990 mm) and discard thickness of 1.465 inches (37.210 mm)
• Outside diameter of 12.870 inches (326.900 mm) suitable for heavy-duty applications
• Eight mounting bolt holes with a bolt circle diameter of 6.500 inches (165.100 mm)
• Center hole diameter of 5.008 inches (127.200 mm)
• Solid smooth surface type for consistent braking contact
• Weight approximately 28.5 lbs (12.95 kgs)

Product Line Details

The Centric GCX Elemental Protection Disc Brake Rotors - Full Coating line focuses on providing rotors with a complete protective coating to resist rust and corrosion. This full coating extends the rotor’s service life, especially in harsh environments where moisture and road salts are common. The coated hat and disc surfaces help maintain structural integrity and appearance over time, making it a practical choice for Chevrolet, Dodge, and GMC heavy-duty trucks.

Technical Description and Specifications

This disc brake rotor features a vented design with straight vanes that facilitate efficient heat dissipation during braking, reducing the risk of brake fade. The rotor’s nominal thickness is 1.535 inches (38.990 mm), with a discard thickness of 1.465 inches (37.210 mm), ensuring safe replacement intervals. The smooth surface finish provides consistent pad contact, while the fully coated disc and hat protect against corrosion. The rotor mounts behind the hub and includes eight mounting bolt holes with a diameter of 0.697 inches (17.700 mm), arranged on a 6.500-inch (165.100 mm) bolt circle diameter. The center hole diameter measures 5.008 inches (127.200 mm), compatible with the specified vehicle models.

Compatible Vehicles and Applications

• Chevrolet K30 and K3500 heavy-duty trucks
• Dodge V30 and V3500 models
• GMC W250 and W350 trucks
• Ideal for vehicles requiring vented rotors with full coating protection
• Suitable for heavy-duty braking demands in commercial and fleet use

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (1.465 inches) before installation
• Clean mounting surfaces to prevent uneven rotor seating
• Torque mounting bolts to manufacturer specifications for secure fitment
• Check compatibility with ABS systems; this rotor does not include an ABS tone ring
• Inspect brake pads and hardware during rotor replacement for optimal performance

Quality Assurance and Warranty

Centric provides quality-tested rotors manufactured to meet or exceed OEM specifications. The full coating process enhances corrosion resistance, contributing to longer rotor life. While specific warranty details are not provided here, Centric products typically come with a limited warranty against defects in materials and workmanship. Always refer to Centric’s official warranty documentation for complete terms.